20123202131 has 4 divisors (see below), whose sum is σ = 20123596200. Its totient is φ = 20122808064.

The previous prime is 20123202041. The next prime is 20123202137. The reversal of 20123202131 is 13120232102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20123202131 - 2¹⁰ = 20123201107 is a prime.

It is a super-2 number, since 2×20123202131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123202137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106601 + ... + 227178.

It is an arithmetic number, because the mean of its divisors is an integer number (5030899050).

Almost surely, 2^20123202131 is an apocalyptic number.

20123202131 is a deficient number, since it is larger than the sum of its proper divisors (394069).

20123202131 is an equidigital number, since it uses as much as digits as its factorization.

20123202131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394068.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20123202131 its reverse (13120232102), we get a palindrome (33243434233).

The spelling of 20123202131 in words is "twenty billion, one hundred twenty-three million, two hundred two thousand, one hundred thirty-one".