21110011202051 has 2 divisors, whose sum is σ = 21110011202052. Its totient is φ = 21110011202050.

The previous prime is 21110011201999. The next prime is 21110011202117. The reversal of 21110011202051 is 15020211001112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21110011202051 - 2⁶ = 21110011201987 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110011202551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555005601025 + 10555005601026.

It is an arithmetic number, because the mean of its divisors is an integer number (10555005601026).

Almost surely, 2^{21110011202051} is an apocalyptic number.

21110011202051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110011202051 is an equidigital number, since it uses as much as digits as its factorization.

21110011202051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 21110011202051 its reverse (15020211001112), we get a palindrome (36130222203163).

The spelling of 21110011202051 in words is "twenty-one trillion, one hundred ten billion, eleven million, two hundred two thousand, fifty-one".