321140300020081 has 2 divisors, whose sum is σ = 321140300020082. Its totient is φ = 321140300020080.

The previous prime is 321140300020013. The next prime is 321140300020097. The reversal of 321140300020081 is 180020003041123.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304887952803681 + 16252347216400 = 17461041^2 + 4031420^2 .

It is a cyclic number.

It is not a de Polignac number, because 321140300020081 - 2⁷ = 321140300019953 is a prime.

It is a super-2 number, since 2×321140300020081² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321140300420081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160570150010040 + 160570150010041.

It is an arithmetic number, because the mean of its divisors is an integer number (160570150010041).

Almost surely, 2^{321140300020081} is an apocalyptic number.

It is an amenable number.

321140300020081 is a deficient number, since it is larger than the sum of its proper divisors (1).

321140300020081 is an equidigital number, since it uses as much as digits as its factorization.

321140300020081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 321140300020081 in words is "three hundred twenty-one trillion, one hundred forty billion, three hundred million, twenty thousand, eighty-one".