21551175626201 has 24 divisors (see below), whose sum is σ = 24551607959424. Its totient is φ = 18802643361120.

The previous prime is 21551175626191. The next prime is 21551175626207. The reversal of 21551175626201 is 10262657115512.

It is not a de Polignac number, because 21551175626201 - 2¹⁸ = 21551175364057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21551175626207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3304691 + ... + 7350056.

It is an arithmetic number, because the mean of its divisors is an integer number (1022983664976).

Almost surely, 2^{21551175626201} is an apocalyptic number.

It is an amenable number.

21551175626201 is a deficient number, since it is larger than the sum of its proper divisors (3000432333223).

21551175626201 is a wasteful number, since it uses less digits than its factorization.

21551175626201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10655229 (or 10655210 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 44.

The spelling of 21551175626201 in words is "twenty-one trillion, five hundred fifty-one billion, one hundred seventy-five million, six hundred twenty-six thousand, two hundred one".