20011233131 has 2 divisors, whose sum is σ = 20011233132. Its totient is φ = 20011233130.

The previous prime is 20011233097. The next prime is 20011233169. The reversal of 20011233131 is 13133211002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20011233131 - 2³⁴ = 2831363947 is a prime.

It is a super-2 number, since 2×20011233131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20011230131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005616565 + 10005616566.

It is an arithmetic number, because the mean of its divisors is an integer number (10005616566).

Almost surely, 2^20011233131 is an apocalyptic number.

20011233131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011233131 is an equidigital number, since it uses as much as digits as its factorization.

20011233131 is an evil number, because the sum of its binary digits is even.

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

Adding to 20011233131 its reverse (13133211002), we get a palindrome (33144444133).

The spelling of 20011233131 in words is "twenty billion, eleven million, two hundred thirty-three thousand, one hundred thirty-one".