102130211321 has 4 divisors (see below), whose sum is σ = 102131249652. Its totient is φ = 102129172992.

The previous prime is 102130211251. The next prime is 102130211503. The reversal of 102130211321 is 123112031201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 123112031201 = 67 ⋅1837493003.

It can be written as a sum of positive squares in 2 ways, for example, as 59811550096 + 42318661225 = 244564^2 + 205715^2 .

It is a cyclic number.

It is not a de Polignac number, because 102130211321 - 2²⁶ = 102063102457 is a prime.

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 102130211321.

It is not an unprimeable number, because it can be changed into a prime (102130211221) 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, 354140 + ... + 574173.

It is an arithmetic number, because the mean of its divisors is an integer number (25532812413).

Almost surely, 2^102130211321 is an apocalyptic number.

It is an amenable number.

102130211321 is a deficient number, since it is larger than the sum of its proper divisors (1038331).

102130211321 is an equidigital number, since it uses as much as digits as its factorization.

102130211321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038330.

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

Adding to 102130211321 its reverse (123112031201), we get a palindrome (225242242522).

The spelling of 102130211321 in words is "one hundred two billion, one hundred thirty million, two hundred eleven thousand, three hundred twenty-one".