1021252655115 has 96 divisors (see below), whose sum is σ = 2336788486656. Its totient is φ = 399450977280.

The previous prime is 1021252655089. The next prime is 1021252655153. The reversal of 1021252655115 is 5115562521201.

1021252655115 is a `hidden beast` number, since 1 + 0 + 2 + 12 + 526 + 5 + 5 + 115 = 666.

It is not a de Polignac number, because 1021252655115 - 2⁵ = 1021252655083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021252655115.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8609737 + ... + 8727546.

It is an arithmetic number, because the mean of its divisors is an integer number (24341546736).

Almost surely, 2^{1021252655115} is an apocalyptic number.

1021252655115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1021252655115 is an abundant number, since it is smaller than the sum of its proper divisors (1315535831541).

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

1021252655115 is a wasteful number, since it uses less digits than its factorization.

1021252655115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17337329 (or 17337326 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 36.

The spelling of 1021252655115 in words is "one trillion, twenty-one billion, two hundred fifty-two million, six hundred fifty-five thousand, one hundred fifteen".