1213152612 has 48 divisors (see below), whose sum is σ = 3267126912. Its totient is φ = 343180800.

The previous prime is 1213152607. The next prime is 1213152637. The reversal of 1213152612 is 2162513121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63013 + ... + 79980.

It is an arithmetic number, because the mean of its divisors is an integer number (68065144).

Almost surely, 2^1213152612 is an apocalyptic number.

1213152612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213152612 is an abundant number, since it is smaller than the sum of its proper divisors (2053974300).

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

1213152612 is a wasteful number, since it uses less digits than its factorization.

1213152612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143108 (or 143106 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 1213152612 is about 34830.3403945468. The cubic root of 1213152612 is about 1066.5268970942.

Adding to 1213152612 its reverse (2162513121), we get a palindrome (3375665733).

The spelling of 1213152612 in words is "one billion, two hundred thirteen million, one hundred fifty-two thousand, six hundred twelve".