1212423030 has 192 divisors, whose sum is σ = 3985607808. Its totient is φ = 248832000.

The previous prime is 1212423029. The next prime is 1212423031. The reversal of 1212423030 is 303242121.

1212423030 is a `hidden beast` number, since 1 + 212 + 423 + 0 + 30 = 666.

It is an interprime number because it is at equal distance from previous prime (1212423029) and next prime (1212423031).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1212422994 and 1212423012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212423031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 301030 + ... + 305030.

It is an arithmetic number, because the mean of its divisors is an integer number (20758374).

Almost surely, 2^1212423030 is an apocalyptic number.

1212423030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212423030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1992803904).

1212423030 is an abundant number, since it is smaller than the sum of its proper divisors (2773184778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212423030 is a wasteful number, since it uses less digits than its factorization.

1212423030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4071 (or 4068 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1212423030 is about 34819.8654506303. The cubic root of 1212423030 is about 1066.3130534672.

Adding to 1212423030 its reverse (303242121), we get a palindrome (1515665151).

The spelling of 1212423030 in words is "one billion, two hundred twelve million, four hundred twenty-three thousand, thirty".