102021131321 has 8 divisors (see below), whose sum is σ = 102189356544. Its totient is φ = 101852956800.

The previous prime is 102021131299. The next prime is 102021131327. The reversal of 102021131321 is 123131120201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102021131321 is a prime.

It is a super-2 number, since 2×102021131321² (a number of 23 digits) contains 22 as substring.

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 102021131321.

It is not an unprimeable number, because it can be changed into a prime (102021131327) 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, 7751096 + ... + 7764246.

It is an arithmetic number, because the mean of its divisors is an integer number (12773669568).

Almost surely, 2^102021131321 is an apocalyptic number.

It is an amenable number.

102021131321 is a deficient number, since it is larger than the sum of its proper divisors (168225223).

102021131321 is a wasteful number, since it uses less digits than its factorization.

102021131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25351.

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

Adding to 102021131321 its reverse (123131120201), we get a palindrome (225152251522).

The spelling of 102021131321 in words is "one hundred two billion, twenty-one million, one hundred thirty-one thousand, three hundred twenty-one".