1251116051700 has 72 divisors (see below), whose sum is σ = 3620010179520. Its totient is φ = 333620403200.

The previous prime is 1251116051699. The next prime is 1251116051707. The reversal of 1251116051700 is 71506111521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251116051707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15791185 + ... + 15870215.

It is an arithmetic number, because the mean of its divisors is an integer number (50277919160).

Almost surely, 2^{1251116051700} is an apocalyptic number.

1251116051700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251116051700 is an abundant number, since it is smaller than the sum of its proper divisors (2368894127820).

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

1251116051700 is a wasteful number, since it uses less digits than its factorization.

1251116051700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131817 (or 131810 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 30.

The spelling of 1251116051700 in words is "one trillion, two hundred fifty-one billion, one hundred sixteen million, fifty-one thousand, seven hundred".