1051200013521 has 48 divisors (see below), whose sum is σ = 1701984579584. Its totient is φ = 565222323456.

The previous prime is 1051200013517. The next prime is 1051200013537. The reversal of 1051200013521 is 1253100021501.

It is not a de Polignac number, because 1051200013521 - 2² = 1051200013517 is a prime.

It is a super-2 number, since 2×1051200013521² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051200013321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30467346 + ... + 30501828.

Almost surely, 2^{1051200013521} is an apocalyptic number.

It is an amenable number.

1051200013521 is a deficient number, since it is larger than the sum of its proper divisors (650784566063).

1051200013521 is a wasteful number, since it uses less digits than its factorization.

1051200013521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39550 (or 39533 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The spelling of 1051200013521 in words is "one trillion, fifty-one billion, two hundred million, thirteen thousand, five hundred twenty-one".