20213031131023 has 2 divisors, whose sum is σ = 20213031131024. Its totient is φ = 20213031131022.

The previous prime is 20213031130979. The next prime is 20213031131053. The reversal of 20213031131023 is 32013113031202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20213031131023 - 2²⁹ = 20212494260111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20213031130985 and 20213031131003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20213031131053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106515565511 + 10106515565512.

It is an arithmetic number, because the mean of its divisors is an integer number (10106515565512).

Almost surely, 2^{20213031131023} is an apocalyptic number.

20213031131023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213031131023 is an equidigital number, since it uses as much as digits as its factorization.

20213031131023 is an evil number, because the sum of its binary digits is even.

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

Adding to 20213031131023 its reverse (32013113031202), we get a palindrome (52226144162225).

The spelling of 20213031131023 in words is "twenty trillion, two hundred thirteen billion, thirty-one million, one hundred thirty-one thousand, twenty-three".