20210117131 has 8 divisors (see below), whose sum is σ = 20508440400. Its totient is φ = 19913630208.

The previous prime is 20210117117. The next prime is 20210117141. The reversal of 20210117131 is 13171101202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20210117131 - 2²³ = 20201728523 is a prime.

It is a super-2 number, since 2×20210117131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20210117099 and 20210117108.

It is not an unprimeable number, because it can be changed into a prime (20210117101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436906 + ... + 480943.

It is an arithmetic number, because the mean of its divisors is an integer number (2563555050).

Almost surely, 2^20210117131 is an apocalyptic number.

20210117131 is a deficient number, since it is larger than the sum of its proper divisors (298323269).

20210117131 is an equidigital number, since it uses as much as digits as its factorization.

20210117131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918173.

The product of its (nonzero) digits is 84, while the sum is 19.

Adding to 20210117131 its reverse (13171101202), we get a palindrome (33381218333).

It can be divided in two parts, 202101171 and 31, that added together give a palindrome (202101202).

The spelling of 20210117131 in words is "twenty billion, two hundred ten million, one hundred seventeen thousand, one hundred thirty-one".