21302320122111 has 64 divisors (see below), whose sum is σ = 34350915200000. Its totient is φ = 11470894175232.

The previous prime is 21302320122079. The next prime is 21302320122113. The reversal of 21302320122111 is 11122102320312.

It is not a de Polignac number, because 21302320122111 - 2⁵ = 21302320122079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302320122113) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56766645 + ... + 57140673.

It is an arithmetic number, because the mean of its divisors is an integer number (536733050000).

Almost surely, 2^{21302320122111} is an apocalyptic number.

21302320122111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21302320122111 is a deficient number, since it is larger than the sum of its proper divisors (13048595077889).

21302320122111 is a wasteful number, since it uses less digits than its factorization.

21302320122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374816.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21302320122111 its reverse (11122102320312), we get a palindrome (32424422442423).

The spelling of 21302320122111 in words is "twenty-one trillion, three hundred two billion, three hundred twenty million, one hundred twenty-two thousand, one hundred eleven".