321979209103 has 2 divisors, whose sum is σ = 321979209104. Its totient is φ = 321979209102.

The previous prime is 321979209047. The next prime is 321979209197. The reversal of 321979209103 is 301902979123.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321979209103 - 2³⁷ = 184540255631 is a prime.

It is a super-2 number, since 2×321979209103² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321979209203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160989604551 + 160989604552.

It is an arithmetic number, because the mean of its divisors is an integer number (160989604552).

Almost surely, 2^321979209103 is an apocalyptic number.

321979209103 is a deficient number, since it is larger than the sum of its proper divisors (1).

321979209103 is an equidigital number, since it uses as much as digits as its factorization.

321979209103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 46.

The spelling of 321979209103 in words is "three hundred twenty-one billion, nine hundred seventy-nine million, two hundred nine thousand, one hundred three".