2197960921901 has 2 divisors, whose sum is σ = 2197960921902. Its totient is φ = 2197960921900.

The previous prime is 2197960921847. The next prime is 2197960921939. The reversal of 2197960921901 is 1091290697912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1818320099401 + 379640822500 = 1348451^2 + 616150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197960921901 - 2³⁰ = 2196887180077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2197960921001) 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, 1098980460950 + 1098980460951.

It is an arithmetic number, because the mean of its divisors is an integer number (1098980460951).

Almost surely, 2^{2197960921901} is an apocalyptic number.

It is an amenable number.

2197960921901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197960921901 is an equidigital number, since it uses as much as digits as its factorization.

2197960921901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 56.

The spelling of 2197960921901 in words is "two trillion, one hundred ninety-seven billion, nine hundred sixty million, nine hundred twenty-one thousand, nine hundred one".