1251232113200 has 60 divisors (see below), whose sum is σ = 3009585495480. Its totient is φ = 499910062080.

The previous prime is 1251232113133. The next prime is 1251232113253. The reversal of 1251232113200 is 23112321521.

It is a super-2 number, since 2×1251232113200² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1477169 + ... + 2164368.

It is an arithmetic number, because the mean of its divisors is an integer number (50159758258).

Almost surely, 2^{1251232113200} is an apocalyptic number.

1251232113200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251232113200 is an abundant number, since it is smaller than the sum of its proper divisors (1758353382280).

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

1251232113200 is a wasteful number, since it uses less digits than its factorization.

1251232113200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642414 (or 3642403 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 1251232113200 its reverse (23112321521), we get a palindrome (1274344434721).

The spelling of 1251232113200 in words is "one trillion, two hundred fifty-one billion, two hundred thirty-two million, one hundred thirteen thousand, two hundred".