20031101131 has 4 divisors (see below), whose sum is σ = 20069549064. Its totient is φ = 19992653200.

The previous prime is 20031101093. The next prime is 20031101161. The reversal of 20031101131 is 13110113002.

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 20031101131 - 2¹¹ = 20031099083 is a prime.

It is a super-2 number, since 2×20031101131² (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 (20031101161) 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, 19223185 + ... + 19224226.

It is an arithmetic number, because the mean of its divisors is an integer number (5017387266).

Almost surely, 2^20031101131 is an apocalyptic number.

20031101131 is a deficient number, since it is larger than the sum of its proper divisors (38447933).

20031101131 is an equidigital number, since it uses as much as digits as its factorization.

20031101131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38447932.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 20031101131 its reverse (13110113002), we get a palindrome (33141214133).

The spelling of 20031101131 in words is "twenty billion, thirty-one million, one hundred one thousand, one hundred thirty-one".