21120133102111 has 4 divisors (see below), whose sum is σ = 21120145416000. Its totient is φ = 21120120788224.

The previous prime is 21120133102097. The next prime is 21120133102151. The reversal of 21120133102111 is 11120133102112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21120133102111 - 2¹³ = 21120133093919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120133102151) 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, 3067471 + ... + 7186768.

It is an arithmetic number, because the mean of its divisors is an integer number (5280036354000).

Almost surely, 2^{21120133102111} is an apocalyptic number.

21120133102111 is a deficient number, since it is larger than the sum of its proper divisors (12313889).

21120133102111 is a wasteful number, since it uses less digits than its factorization.

21120133102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12313888.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21120133102111 its reverse (11120133102112), we get a palindrome (32240266204223).

Subtracting from 21120133102111 its reverse (11120133102112), we obtain a palindrome (9999999999999).

The spelling of 21120133102111 in words is "twenty-one trillion, one hundred twenty billion, one hundred thirty-three million, one hundred two thousand, one hundred eleven".