20121013023 has 16 divisors (see below), whose sum is σ = 27133806336. Its totient is φ = 13261550400.

The previous prime is 20121012953. The next prime is 20121013037. The reversal of 20121013023 is 32031012102.

It is not a de Polignac number, because 20121013023 - 2⁹ = 20121012511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20121012993 and 20121013011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121013043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131536 + ... + 239882.

It is an arithmetic number, because the mean of its divisors is an integer number (1695862896).

Almost surely, 2^20121013023 is an apocalyptic number.

20121013023 is a deficient number, since it is larger than the sum of its proper divisors (7012793313).

20121013023 is a wasteful number, since it uses less digits than its factorization.

20121013023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109054.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20121013023 its reverse (32031012102), we get a palindrome (52152025125).

The spelling of 20121013023 in words is "twenty billion, one hundred twenty-one million, thirteen thousand, twenty-three".