320121202993 has 2 divisors, whose sum is σ = 320121202994. Its totient is φ = 320121202992.

The previous prime is 320121202987. The next prime is 320121203009. The reversal of 320121202993 is 399202121023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 283553055009 + 36568147984 = 532497^2 + 191228^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320121202993 is a prime.

It is not a weakly prime, because it can be changed into another prime (320121202963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160060601496 + 160060601497.

It is an arithmetic number, because the mean of its divisors is an integer number (160060601497).

Almost surely, 2^320121202993 is an apocalyptic number.

It is an amenable number.

320121202993 is a deficient number, since it is larger than the sum of its proper divisors (1).

320121202993 is an equidigital number, since it uses as much as digits as its factorization.

320121202993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 320121202993 in words is "three hundred twenty billion, one hundred twenty-one million, two hundred two thousand, nine hundred ninety-three".