31431113204123 has 2 divisors, whose sum is σ = 31431113204124. Its totient is φ = 31431113204122.

The previous prime is 31431113204089. The next prime is 31431113204137. The reversal of 31431113204123 is 32140231113413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31431113204123 - 2⁶ = 31431113204059 is a prime.

It is not a weakly prime, because it can be changed into another prime (31431113204423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15715556602061 + 15715556602062.

It is an arithmetic number, because the mean of its divisors is an integer number (15715556602062).

Almost surely, 2^{31431113204123} is an apocalyptic number.

31431113204123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31431113204123 is an equidigital number, since it uses as much as digits as its factorization.

31431113204123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 31431113204123 its reverse (32140231113413), we get a palindrome (63571344317536).

The spelling of 31431113204123 in words is "thirty-one trillion, four hundred thirty-one billion, one hundred thirteen million, two hundred four thousand, one hundred twenty-three".