1251236132020 has 24 divisors (see below), whose sum is σ = 3002966717184. Its totient is φ = 428995245216.

The previous prime is 1251236131991. The next prime is 1251236132033. The reversal of 1251236132020 is 202316321521.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1251236132020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4468700332 + ... + 4468700611.

It is an arithmetic number, because the mean of its divisors is an integer number (125123613216).

Almost surely, 2^{1251236132020} is an apocalyptic number.

1251236132020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251236132020 is an abundant number, since it is smaller than the sum of its proper divisors (1751730585164).

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

1251236132020 is a wasteful number, since it uses less digits than its factorization.

1251236132020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8937400959 (or 8937400957 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 1251236132020 in words is "one trillion, two hundred fifty-one billion, two hundred thirty-six million, one hundred thirty-two thousand, twenty".