102120331321 has 8 divisors (see below), whose sum is σ = 108149086440. Its totient is φ = 96093984768.

The previous prime is 102120331309. The next prime is 102120331331. The reversal of 102120331321 is 123133021201.

It can be written as a sum of positive squares in 4 ways, for example, as 27815568400 + 74304762921 = 166780^2 + 272589^2 .

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-102120331321 is a prime.

It is a super-2 number, since 2×102120331321² (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 (102120331331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514476 + ... + 684781.

It is an arithmetic number, because the mean of its divisors is an integer number (13518635805).

Almost surely, 2^102120331321 is an apocalyptic number.

It is an amenable number.

102120331321 is a deficient number, since it is larger than the sum of its proper divisors (6028755119).

102120331321 is a wasteful number, since it uses less digits than its factorization.

102120331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204283.

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

Adding to 102120331321 its reverse (123133021201), we get a palindrome (225253352522).

The spelling of 102120331321 in words is "one hundred two billion, one hundred twenty million, three hundred thirty-one thousand, three hundred twenty-one".