20121331031023 has 2 divisors, whose sum is σ = 20121331031024. Its totient is φ = 20121331031022.

The previous prime is 20121331031003. The next prime is 20121331031027. The reversal of 20121331031023 is 32013013312102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20121331031023 - 2²⁹ = 20120794160111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20121331030985 and 20121331031003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121331031027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060665515511 + 10060665515512.

It is an arithmetic number, because the mean of its divisors is an integer number (10060665515512).

Almost surely, 2^{20121331031023} is an apocalyptic number.

20121331031023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121331031023 is an equidigital number, since it uses as much as digits as its factorization.

20121331031023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20121331031023 its reverse (32013013312102), we get a palindrome (52134344343125).

The spelling of 20121331031023 in words is "twenty trillion, one hundred twenty-one billion, three hundred thirty-one million, thirty-one thousand, twenty-three".