1223421210 has 192 divisors, whose sum is σ = 3682523520. Its totient is φ = 278691840.

The previous prime is 1223421209. The next prime is 1223421211. The reversal of 1223421210 is 121243221.

It is a happy number.

1223421210 is a `hidden beast` number, since 1 + 223 + 421 + 21 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1223421209) and next prime (1223421211).

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

It is not an unprimeable number, because it can be changed into a prime (1223421211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3630162 + ... + 3630498.

It is an arithmetic number, because the mean of its divisors is an integer number (19179810).

Almost surely, 2^1223421210 is an apocalyptic number.

1223421210 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 1223421210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1841261760).

1223421210 is an abundant number, since it is smaller than the sum of its proper divisors (2459102310).

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

1223421210 is a wasteful number, since it uses less digits than its factorization.

1223421210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1223421210 is about 34977.4385854653. The cubic root of 1223421210 is about 1069.5276134151.

Adding to 1223421210 its reverse (121243221), we get a palindrome (1344664431).

The spelling of 1223421210 in words is "one billion, two hundred twenty-three million, four hundred twenty-one thousand, two hundred ten".