1155015225021 has 32 divisors (see below), whose sum is σ = 1769841819648. Its totient is φ = 656329080960.

The previous prime is 1155015224989. The next prime is 1155015225031. The reversal of 1155015225021 is 1205225105511.

It is not a de Polignac number, because 1155015225021 - 2⁵ = 1155015224989 is a prime.

It is a super-2 number, since 2×1155015225021² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1155015225021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155015225031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12077625 + ... + 12172881.

It is an arithmetic number, because the mean of its divisors is an integer number (55307556864).

Almost surely, 2^{1155015225021} is an apocalyptic number.

It is an amenable number.

1155015225021 is a deficient number, since it is larger than the sum of its proper divisors (614826594627).

1155015225021 is a wasteful number, since it uses less digits than its factorization.

1155015225021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98481.

The product of its (nonzero) digits is 5000, while the sum is 30.

The spelling of 1155015225021 in words is "one trillion, one hundred fifty-five billion, fifteen million, two hundred twenty-five thousand, twenty-one".