20133111131 has 16 divisors (see below), whose sum is σ = 24051518400. Its totient is φ = 16836039360.

The previous prime is 20133111121. The next prime is 20133111161. The reversal of 20133111131 is 13111133102.

It is not a de Polignac number, because 20133111131 - 2¹⁸ = 20132848987 is a prime.

It is a super-2 number, since 2×20133111131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20133111121) 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, 701756 + ... + 729881.

It is an arithmetic number, because the mean of its divisors is an integer number (1503219900).

Almost surely, 2^20133111131 is an apocalyptic number.

20133111131 is a deficient number, since it is larger than the sum of its proper divisors (3918407269).

20133111131 is an equidigital number, since it uses as much as digits as its factorization.

20133111131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431699 (or 1431685 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 20133111131 its reverse (13111133102), we get a palindrome (33244244233).

The spelling of 20133111131 in words is "twenty billion, one hundred thirty-three million, one hundred eleven thousand, one hundred thirty-one".