102012321131 has 4 divisors (see below), whose sum is σ = 116585509872. Its totient is φ = 87439132392.

The previous prime is 102012321097. The next prime is 102012321217. The reversal of 102012321131 is 131123210201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102012321131 is a prime.

It is a super-2 number, since 2×102012321131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102012321331) 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, 7286594360 + ... + 7286594373.

It is an arithmetic number, because the mean of its divisors is an integer number (29146377468).

Almost surely, 2^102012321131 is an apocalyptic number.

102012321131 is a deficient number, since it is larger than the sum of its proper divisors (14573188741).

102012321131 is an equidigital number, since it uses as much as digits as its factorization.

102012321131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14573188740.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 102012321131 its reverse (131123210201), we get a palindrome (233135531332).

It can be divided in two parts, 10201 and 2321131, that added together give a palindrome (2331332).

The spelling of 102012321131 in words is "one hundred two billion, twelve million, three hundred twenty-one thousand, one hundred thirty-one".