1213229956 has 12 divisors (see below), whose sum is σ = 2248043868. Its totient is φ = 570931712.

The previous prime is 1213229891. The next prime is 1213229957. The reversal of 1213229956 is 6599223121.

It can be written as a sum of positive squares in 2 ways, for example, as 413471556 + 799758400 = 20334^2 + 28280^2 .

It is a super-2 number, since 2×1213229956² = 2943853852271523872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213229957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8920741 + ... + 8920876.

It is an arithmetic number, because the mean of its divisors is an integer number (187336989).

Almost surely, 2^1213229956 is an apocalyptic number.

It is an amenable number.

1213229956 is a deficient number, since it is larger than the sum of its proper divisors (1034813912).

1213229956 is a wasteful number, since it uses less digits than its factorization.

1213229956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17841638 (or 17841636 counting only the distinct ones).

The product of its digits is 58320, while the sum is 40.

The square root of 1213229956 is about 34831.4506732062. The cubic root of 1213229956 is about 1066.5495619270.

The spelling of 1213229956 in words is "one billion, two hundred thirteen million, two hundred twenty-nine thousand, nine hundred fifty-six".