102021311131 has 2 divisors, whose sum is σ = 102021311132. Its totient is φ = 102021311130.

The previous prime is 102021311123. The next prime is 102021311137. The reversal of 102021311131 is 131113120201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102021311131 - 2³ = 102021311123 is a prime.

It is a super-2 number, since 2×102021311131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102021311137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010655565 + 51010655566.

It is an arithmetic number, because the mean of its divisors is an integer number (51010655566).

Almost surely, 2^102021311131 is an apocalyptic number.

102021311131 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021311131 is an equidigital number, since it uses as much as digits as its factorization.

102021311131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 102021311131 its reverse (131113120201), we get a palindrome (233134431332).

The spelling of 102021311131 in words is "one hundred two billion, twenty-one million, three hundred eleven thousand, one hundred thirty-one".