21112132111423 has 2 divisors, whose sum is σ = 21112132111424. Its totient is φ = 21112132111422.

The previous prime is 21112132111391. The next prime is 21112132111429. The reversal of 21112132111423 is 32411123121112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21112132111423 - 2⁵ = 21112132111391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112132111429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556066055711 + 10556066055712.

It is an arithmetic number, because the mean of its divisors is an integer number (10556066055712).

Almost surely, 2^{21112132111423} is an apocalyptic number.

21112132111423 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112132111423 is an equidigital number, since it uses as much as digits as its factorization.

21112132111423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 25.

Adding to 21112132111423 its reverse (32411123121112), we get a palindrome (53523255232535).

The spelling of 21112132111423 in words is "twenty-one trillion, one hundred twelve billion, one hundred thirty-two million, one hundred eleven thousand, four hundred twenty-three".