20012111023 has 2 divisors, whose sum is σ = 20012111024. Its totient is φ = 20012111022.

The previous prime is 20012110991. The next prime is 20012111083. The reversal of 20012111023 is 32011121002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20012111023 - 2⁵ = 20012110991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20012110994 and 20012111012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012111083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006055511 + 10006055512.

It is an arithmetic number, because the mean of its divisors is an integer number (10006055512).

Almost surely, 2^20012111023 is an apocalyptic number.

20012111023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012111023 is an equidigital number, since it uses as much as digits as its factorization.

20012111023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20012111023 its reverse (32011121002), we get a palindrome (52023232025).

The spelling of 20012111023 in words is "twenty billion, twelve million, one hundred eleven thousand, twenty-three".