21121023230023 has 2 divisors, whose sum is σ = 21121023230024. Its totient is φ = 21121023230022.

The previous prime is 21121023230003. The next prime is 21121023230051. The reversal of 21121023230023 is 32003232012112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21121023230023 - 2¹⁷ = 21121023098951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21121023229976 and 21121023230003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21121023230003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560511615011 + 10560511615012.

It is an arithmetic number, because the mean of its divisors is an integer number (10560511615012).

Almost surely, 2^{21121023230023} is an apocalyptic number.

21121023230023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121023230023 is an equidigital number, since it uses as much as digits as its factorization.

21121023230023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21121023230023 its reverse (32003232012112), we get a palindrome (53124255242135).

The spelling of 21121023230023 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-three million, two hundred thirty thousand, twenty-three".