2001221902297 has 2 divisors, whose sum is σ = 2001221902298. Its totient is φ = 2001221902296.

The previous prime is 2001221902237. The next prime is 2001221902319. The reversal of 2001221902297 is 7922091221002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1429306327296 + 571915575001 = 1195536^2 + 756251^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001221902297 - 2¹⁵ = 2001221869529 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001221902237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000610951148 + 1000610951149.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610951149).

Almost surely, 2^{2001221902297} is an apocalyptic number.

It is an amenable number.

2001221902297 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001221902297 is an equidigital number, since it uses as much as digits as its factorization.

2001221902297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 2001221902297 in words is "two trillion, one billion, two hundred twenty-one million, nine hundred two thousand, two hundred ninety-seven".