21122011132123 has 16 divisors (see below), whose sum is σ = 23071841021952. Its totient is φ = 19177133184000.

The previous prime is 21122011132109. The next prime is 21122011132129. The reversal of 21122011132123 is 32123111022112.

It is a happy number.

It is not a de Polignac number, because 21122011132123 - 2²⁵ = 21121977577691 is a prime.

It is a super-2 number, since 2×21122011132123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21122011132094 and 21122011132103.

It is not an unprimeable number, because it can be changed into a prime (21122011132129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39314715 + ... + 39848347.

It is an arithmetic number, because the mean of its divisors is an integer number (1441990063872).

Almost surely, 2^{21122011132123} is an apocalyptic number.

21122011132123 is a deficient number, since it is larger than the sum of its proper divisors (1949829889829).

21122011132123 is a wasteful number, since it uses less digits than its factorization.

21122011132123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538266.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21122011132123 its reverse (32123111022112), we get a palindrome (53245122154235).

The spelling of 21122011132123 in words is "twenty-one trillion, one hundred twenty-two billion, eleven million, one hundred thirty-two thousand, one hundred twenty-three".