1212151230 has 80 divisors (see below), whose sum is σ = 3268568160. Its totient is φ = 322325568.

The previous prime is 1212151223. The next prime is 1212151231. The reversal of 1212151230 is 321512121.

1212151230 is a `hidden beast` number, since 1 + 2 + 121 + 512 + 30 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212151231) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 313167 + ... + 317013.

It is an arithmetic number, because the mean of its divisors is an integer number (40857102).

Almost surely, 2^1212151230 is an apocalyptic number.

1212151230 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 1212151230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1634284080).

1212151230 is an abundant number, since it is smaller than the sum of its proper divisors (2056416930).

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

1212151230 is a wasteful number, since it uses less digits than its factorization.

1212151230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4255 (or 4246 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1212151230 is about 34815.9622874336. The cubic root of 1212151230 is about 1066.2333657837.

Adding to 1212151230 its reverse (321512121), we get a palindrome (1533663351).

The spelling of 1212151230 in words is "one billion, two hundred twelve million, one hundred fifty-one thousand, two hundred thirty".