20113231223131 has 8 divisors (see below), whose sum is σ = 20121298424640. Its totient is φ = 20105164405128.

The previous prime is 20113231223017. The next prime is 20113231223177. The reversal of 20113231223131 is 13132213231102.

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 20113231223131 - 2³³ = 20104641288539 is a prime.

It is a super-2 number, since 2×20113231223131² (a number of 27 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 = 20113231223096 and 20113231223105.

It is not an unprimeable number, because it can be changed into a prime (20113231223231) 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, 152738940 + ... + 152870566.

It is an arithmetic number, because the mean of its divisors is an integer number (2515162303080).

Almost surely, 2^{20113231223131} is an apocalyptic number.

20113231223131 is a deficient number, since it is larger than the sum of its proper divisors (8067201509).

20113231223131 is a wasteful number, since it uses less digits than its factorization.

20113231223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191753.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 20113231223131 its reverse (13132213231102), we get a palindrome (33245444454233).

The spelling of 20113231223131 in words is "twenty trillion, one hundred thirteen billion, two hundred thirty-one million, two hundred twenty-three thousand, one hundred thirty-one".