21122133023 has 2 divisors, whose sum is σ = 21122133024. Its totient is φ = 21122133022.

The previous prime is 21122132981. The next prime is 21122133037. The reversal of 21122133023 is 32033122112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21122133023 - 2⁶ = 21122132959 is a prime.

It is a super-2 number, since 2×21122133023² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21122132986 and 21122133004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21122133083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561066511 + 10561066512.

It is an arithmetic number, because the mean of its divisors is an integer number (10561066512).

Almost surely, 2^21122133023 is an apocalyptic number.

21122133023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122133023 is an equidigital number, since it uses as much as digits as its factorization.

21122133023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21122133023 its reverse (32033122112), we get a palindrome (53155255135).

The spelling of 21122133023 in words is "twenty-one billion, one hundred twenty-two million, one hundred thirty-three thousand, twenty-three".