31131101001 has 32 divisors (see below), whose sum is σ = 55731207168. Its totient is φ = 14927999040.

The previous prime is 31131100991. The next prime is 31131101051. The reversal of 31131101001 is 10010113113.

It is not a de Polignac number, because 31131101001 - 2⁵ = 31131100969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31131101051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5180331 + ... + 5186336.

It is an arithmetic number, because the mean of its divisors is an integer number (1741600224).

Almost surely, 2^31131101001 is an apocalyptic number.

It is an amenable number.

31131101001 is a deficient number, since it is larger than the sum of its proper divisors (24600106167).

31131101001 is a wasteful number, since it uses less digits than its factorization.

31131101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10366701.

The product of its (nonzero) digits is 9, while the sum is 12.

Adding to 31131101001 its reverse (10010113113), we get a palindrome (41141214114).

The spelling of 31131101001 in words is "thirty-one billion, one hundred thirty-one million, one hundred one thousand, one".