20112303131 has 4 divisors (see below), whose sum is σ = 20120104200. Its totient is φ = 20104502064.

The previous prime is 20112303109. The next prime is 20112303179. The reversal of 20112303131 is 13130321102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112303131 is a prime.

It is a super-2 number, since 2×20112303131² (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 (20112303191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3896666 + ... + 3901823.

It is an arithmetic number, because the mean of its divisors is an integer number (5030026050).

Almost surely, 2^20112303131 is an apocalyptic number.

20112303131 is a deficient number, since it is larger than the sum of its proper divisors (7801069).

20112303131 is an equidigital number, since it uses as much as digits as its factorization.

20112303131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7801068.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20112303131 its reverse (13130321102), we get a palindrome (33242624233).

The spelling of 20112303131 in words is "twenty billion, one hundred twelve million, three hundred three thousand, one hundred thirty-one".