321103021013 has 2 divisors, whose sum is σ = 321103021014. Its totient is φ = 321103021012.

The previous prime is 321103021009. The next prime is 321103021021. The reversal of 321103021013 is 310120301123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321083156164 + 19864849 = 566642^2 + 4457^2 .

It is a cyclic number.

It is not a de Polignac number, because 321103021013 - 2² = 321103021009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321103020982 and 321103021000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321103021093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160551510506 + 160551510507.

It is an arithmetic number, because the mean of its divisors is an integer number (160551510507).

Almost surely, 2^321103021013 is an apocalyptic number.

It is an amenable number.

321103021013 is a deficient number, since it is larger than the sum of its proper divisors (1).

321103021013 is an equidigital number, since it uses as much as digits as its factorization.

321103021013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 321103021013 its reverse (310120301123), we get a palindrome (631223322136).

The spelling of 321103021013 in words is "three hundred twenty-one billion, one hundred three million, twenty-one thousand, thirteen".