102102113431 has 4 divisors (see below), whose sum is σ = 102170963272. Its totient is φ = 102033263592.

The previous prime is 102102113401. The next prime is 102102113473. The reversal of 102102113431 is 134311201201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134311201201 = 43 ⋅3123516307.

It is a cyclic number.

It is not a de Polignac number, because 102102113431 - 2¹¹ = 102102111383 is a prime.

It is a super-2 number, since 2×102102113431² (a number of 23 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 = 102102113399 and 102102113408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102102113401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34422696 + ... + 34425661.

It is an arithmetic number, because the mean of its divisors is an integer number (25542740818).

Almost surely, 2^102102113431 is an apocalyptic number.

102102113431 is a deficient number, since it is larger than the sum of its proper divisors (68849841).

102102113431 is an equidigital number, since it uses as much as digits as its factorization.

102102113431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68849840.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 102102113431 its reverse (134311201201), we get a palindrome (236413314632).

The spelling of 102102113431 in words is "one hundred two billion, one hundred two million, one hundred thirteen thousand, four hundred thirty-one".