21365107425135 has 160 divisors (see below), whose sum is σ = 40562224148160. Its totient is φ = 10728831117312.

The previous prime is 21365107425121. The next prime is 21365107425217. The reversal of 21365107425135 is 53152470156312.

21365107425135 is a `hidden beast` number, since 2 + 1 + 3 + 65 + 1 + 0 + 74 + 2 + 513 + 5 = 666.

It is not a de Polignac number, because 21365107425135 - 2⁶ = 21365107425071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1535614939 + ... + 1535628851.

It is an arithmetic number, because the mean of its divisors is an integer number (253513900926).

Almost surely, 2^{21365107425135} is an apocalyptic number.

21365107425135 is a deficient number, since it is larger than the sum of its proper divisors (19197116723025).

21365107425135 is a wasteful number, since it uses less digits than its factorization.

21365107425135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15159 (or 15150 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 21365107425135 in words is "twenty-one trillion, three hundred sixty-five billion, one hundred seven million, four hundred twenty-five thousand, one hundred thirty-five".