20023211231123 has 2 divisors, whose sum is σ = 20023211231124. Its totient is φ = 20023211231122.

The previous prime is 20023211231113. The next prime is 20023211231143. The reversal of 20023211231123 is 32113211232002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20023211231123 - 2⁴² = 15625164720019 is a prime.

It is a super-2 number, since 2×20023211231123² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20023211231113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011605615561 + 10011605615562.

It is an arithmetic number, because the mean of its divisors is an integer number (10011605615562).

Almost surely, 2^{20023211231123} is an apocalyptic number.

20023211231123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20023211231123 is an equidigital number, since it uses as much as digits as its factorization.

20023211231123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20023211231123 its reverse (32113211232002), we get a palindrome (52136422463125).

The spelling of 20023211231123 in words is "twenty trillion, twenty-three billion, two hundred eleven million, two hundred thirty-one thousand, one hundred twenty-three".