321211201001 has 2 divisors, whose sum is σ = 321211201002. Its totient is φ = 321211201000.

The previous prime is 321211200971. The next prime is 321211201043. The reversal of 321211201001 is 100102112123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164897717776 + 156313483225 = 406076^2 + 395365^2 .

It is a cyclic number.

It is not a de Polignac number, because 321211201001 - 2²² = 321207006697 is a prime.

It is not a weakly prime, because it can be changed into another prime (321211231001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160605600500 + 160605600501.

It is an arithmetic number, because the mean of its divisors is an integer number (160605600501).

Almost surely, 2^321211201001 is an apocalyptic number.

It is an amenable number.

321211201001 is a deficient number, since it is larger than the sum of its proper divisors (1).

321211201001 is an equidigital number, since it uses as much as digits as its factorization.

321211201001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 321211201001 its reverse (100102112123), we get a palindrome (421313313124).

The spelling of 321211201001 in words is "three hundred twenty-one billion, two hundred eleven million, two hundred one thousand, one".