102311431131 has 16 divisors (see below), whose sum is σ = 167895682304. Its totient is φ = 53966469024.

The previous prime is 102311431129. The next prime is 102311431171. The reversal of 102311431131 is 131134113201.

It is not a de Polignac number, because 102311431131 - 2¹ = 102311431129 is a prime.

It is a super-2 number, since 2×102311431131² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 102311431098 and 102311431107.

It is not an unprimeable number, because it can be changed into a prime (102311431171) 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, 187383301 + ... + 187383846.

It is an arithmetic number, because the mean of its divisors is an integer number (10493480144).

Almost surely, 2^102311431131 is an apocalyptic number.

102311431131 is a deficient number, since it is larger than the sum of its proper divisors (65584251173).

102311431131 is a wasteful number, since it uses less digits than its factorization.

102311431131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374767170.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 102311431131 its reverse (131134113201), we get a palindrome (233445544332).

The spelling of 102311431131 in words is "one hundred two billion, three hundred eleven million, four hundred thirty-one thousand, one hundred thirty-one".