20213124315231 has 16 divisors (see below), whose sum is σ = 27010184281344. Its totient is φ = 13445765640384.

The previous prime is 20213124315229. The next prime is 20213124315247. The reversal of 20213124315231 is 13251342131202.

It is not a de Polignac number, because 20213124315231 - 2¹ = 20213124315229 is a prime.

It is a super-2 number, since 2×20213124315231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213124310231) 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, 20350 + ... + 6358196.

It is an arithmetic number, because the mean of its divisors is an integer number (1688136517584).

Almost surely, 2^{20213124315231} is an apocalyptic number.

20213124315231 is a deficient number, since it is larger than the sum of its proper divisors (6797059966113).

20213124315231 is a wasteful number, since it uses less digits than its factorization.

20213124315231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6340190.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 20213124315231 its reverse (13251342131202), we get a palindrome (33464466446433).

The spelling of 20213124315231 in words is "twenty trillion, two hundred thirteen billion, one hundred twenty-four million, three hundred fifteen thousand, two hundred thirty-one".