1231051312 has 40 divisors (see below), whose sum is σ = 2433326400. Its totient is φ = 603213312.

The previous prime is 1231051303. The next prime is 1231051313. The reversal of 1231051312 is 2131501321.

It is a self number, because there is not a number n which added to its sum of digits gives 1231051312.

It is not an unprimeable number, because it can be changed into a prime (1231051313) 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 7 ways as a sum of consecutive naturals, for example, 169614 + ... + 176722.

It is an arithmetic number, because the mean of its divisors is an integer number (60833160).

Almost surely, 2^1231051312 is an apocalyptic number.

It is an amenable number.

1231051312 is a deficient number, since it is larger than the sum of its proper divisors (1202275088).

1231051312 is a wasteful number, since it uses less digits than its factorization.

1231051312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7333 (or 7327 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1231051312 is about 35086.3408180448. The cubic root of 1231051312 is about 1071.7464453792.

Adding to 1231051312 its reverse (2131501321), we get a palindrome (3362552633).

The spelling of 1231051312 in words is "one billion, two hundred thirty-one million, fifty-one thousand, three hundred twelve".