21100211223201 has 16 divisors (see below), whose sum is σ = 34101351472320. Its totient is φ = 12788006801760.

The previous prime is 21100211223199. The next prime is 21100211223227. The reversal of 21100211223201 is 10232211200112.

21100211223201 is a `hidden beast` number, since 2 + 110 + 0 + 211 + 22 + 320 + 1 = 666.

It is not a de Polignac number, because 21100211223201 - 2¹ = 21100211223199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100211223271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35522240820 + ... + 35522241413.

It is an arithmetic number, because the mean of its divisors is an integer number (2131334467020).

Almost surely, 2^{21100211223201} is an apocalyptic number.

It is an amenable number.

21100211223201 is a deficient number, since it is larger than the sum of its proper divisors (13001140249119).

21100211223201 is a wasteful number, since it uses less digits than its factorization.

21100211223201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71044482253 (or 71044482247 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21100211223201 its reverse (10232211200112), we get a palindrome (31332422423313).

The spelling of 21100211223201 in words is "twenty-one trillion, one hundred billion, two hundred eleven million, two hundred twenty-three thousand, two hundred one".