1251200012620 has 12 divisors (see below), whose sum is σ = 2627520026544. Its totient is φ = 500480005040.

The previous prime is 1251200012533. The next prime is 1251200012633. The reversal of 1251200012620 is 262100021521.

It is a junction number, because it is equal to n+sod(n) for n = 1251200012591 and 1251200012600.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31280000296 + ... + 31280000335.

It is an arithmetic number, because the mean of its divisors is an integer number (218960002212).

Almost surely, 2^{1251200012620} is an apocalyptic number.

1251200012620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251200012620 is an abundant number, since it is smaller than the sum of its proper divisors (1376320013924).

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

1251200012620 is a wasteful number, since it uses less digits than its factorization.

1251200012620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62560000640 (or 62560000638 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The spelling of 1251200012620 in words is "one trillion, two hundred fifty-one billion, two hundred million, twelve thousand, six hundred twenty".