21065722151201 has 16 divisors (see below), whose sum is σ = 25969756130304. Its totient is φ = 16639925891904.

The previous prime is 21065722151189. The next prime is 21065722151233. The reversal of 21065722151201 is 10215122756012.

It is not a de Polignac number, because 21065722151201 - 2¹⁴ = 21065722134817 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21065722151281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190629650 + ... + 190740123.

It is an arithmetic number, because the mean of its divisors is an integer number (1623109758144).

Almost surely, 2^{21065722151201} is an apocalyptic number.

It is an amenable number.

21065722151201 is a deficient number, since it is larger than the sum of its proper divisors (4904033979103).

21065722151201 is a wasteful number, since it uses less digits than its factorization.

21065722151201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381370400.

The product of its (nonzero) digits is 16800, while the sum is 35.

The spelling of 21065722151201 in words is "twenty-one trillion, sixty-five billion, seven hundred twenty-two million, one hundred fifty-one thousand, two hundred one".