21012133112323 has 2 divisors, whose sum is σ = 21012133112324. Its totient is φ = 21012133112322.

The previous prime is 21012133112297. The next prime is 21012133112339. The reversal of 21012133112323 is 32321133121012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21012133112323 - 2⁵ = 21012133112291 is a prime.

It is not a weakly prime, because it can be changed into another prime (21012133112353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506066556161 + 10506066556162.

It is an arithmetic number, because the mean of its divisors is an integer number (10506066556162).

Almost surely, 2^{21012133112323} is an apocalyptic number.

21012133112323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012133112323 is an equidigital number, since it uses as much as digits as its factorization.

21012133112323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21012133112323 its reverse (32321133121012), we get a palindrome (53333266233335).

The spelling of 21012133112323 in words is "twenty-one trillion, twelve billion, one hundred thirty-three million, one hundred twelve thousand, three hundred twenty-three".