102313312021 has 8 divisors (see below), whose sum is σ = 108343126080. Its totient is φ = 96347988288.

The previous prime is 102313312009. The next prime is 102313312069. The reversal of 102313312021 is 120213313201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-102313312021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102313312021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102313312001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16119316 + ... + 16125661.

It is an arithmetic number, because the mean of its divisors is an integer number (13542890760).

Almost surely, 2^102313312021 is an apocalyptic number.

It is an amenable number.

102313312021 is a deficient number, since it is larger than the sum of its proper divisors (6029814059).

102313312021 is a wasteful number, since it uses less digits than its factorization.

102313312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32245163.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 102313312021 its reverse (120213313201), we get a palindrome (222526625222).

The spelling of 102313312021 in words is "one hundred two billion, three hundred thirteen million, three hundred twelve thousand, twenty-one".