20311303220131 has 16 divisors (see below), whose sum is σ = 25331488934400. Its totient is φ = 15821798460480.

The previous prime is 20311303220129. The next prime is 20311303220141. The reversal of 20311303220131 is 13102230311302.

It is a cyclic number.

It is not a de Polignac number, because 20311303220131 - 2¹ = 20311303220129 is a prime.

It is a super-2 number, since 2×20311303220131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20311303220101) 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, 43022551 + ... + 43492096.

It is an arithmetic number, because the mean of its divisors is an integer number (1583218058400).

Almost surely, 2^{20311303220131} is an apocalyptic number.

20311303220131 is a deficient number, since it is larger than the sum of its proper divisors (5020185714269).

20311303220131 is a wasteful number, since it uses less digits than its factorization.

20311303220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86517714.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20311303220131 its reverse (13102230311302), we get a palindrome (33413533531433).

The spelling of 20311303220131 in words is "twenty trillion, three hundred eleven billion, three hundred three million, two hundred twenty thousand, one hundred thirty-one".