21130232212123 has 2 divisors, whose sum is σ = 21130232212124. Its totient is φ = 21130232212122.

The previous prime is 21130232212099. The next prime is 21130232212139. The reversal of 21130232212123 is 32121223203112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21130232212123 is a prime.

It is not a weakly prime, because it can be changed into another prime (21130232212183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565116106061 + 10565116106062.

It is an arithmetic number, because the mean of its divisors is an integer number (10565116106062).

Almost surely, 2^{21130232212123} is an apocalyptic number.

21130232212123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130232212123 is an equidigital number, since it uses as much as digits as its factorization.

21130232212123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21130232212123 its reverse (32121223203112), we get a palindrome (53251455415235).

The spelling of 21130232212123 in words is "twenty-one trillion, one hundred thirty billion, two hundred thirty-two million, two hundred twelve thousand, one hundred twenty-three".