21052120022001 has 80 divisors (see below), whose sum is σ = 32797363027968. Its totient is φ = 13442097744000.

The previous prime is 21052120021991. The next prime is 21052120022039. The reversal of 21052120022001 is 10022002125012.

21052120022001 is a `hidden beast` number, since 210 + 52 + 1 + 200 + 2 + 200 + 1 = 666.

It is not a de Polignac number, because 21052120022001 - 2¹³ = 21052120013809 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21052120022201) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 681437311 + ... + 681468203.

Almost surely, 2^{21052120022001} is an apocalyptic number.

It is an amenable number.

21052120022001 is a deficient number, since it is larger than the sum of its proper divisors (11745243005967).

21052120022001 is a wasteful number, since it uses less digits than its factorization.

21052120022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33724 (or 33715 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 21052120022001 its reverse (10022002125012), we get a palindrome (31074122147013).

The spelling of 21052120022001 in words is "twenty-one trillion, fifty-two billion, one hundred twenty million, twenty-two thousand, one".