21167102017121 has 4 divisors (see below), whose sum is σ = 21333772111872. Its totient is φ = 21000431922372.

The previous prime is 21167102017099. The next prime is 21167102017133. The reversal of 21167102017121 is 12171020176112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21167102017121 - 2⁶ = 21167102017057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21167102017021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83335047185 + ... + 83335047438.

It is an arithmetic number, because the mean of its divisors is an integer number (5333443027968).

Almost surely, 2^{21167102017121} is an apocalyptic number.

It is an amenable number.

21167102017121 is a deficient number, since it is larger than the sum of its proper divisors (166670094751).

21167102017121 is a wasteful number, since it uses less digits than its factorization.

21167102017121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166670094750.

The product of its (nonzero) digits is 2352, while the sum is 32.

The spelling of 21167102017121 in words is "twenty-one trillion, one hundred sixty-seven billion, one hundred two million, seventeen thousand, one hundred twenty-one".