2163466161221 has 2 divisors, whose sum is σ = 2163466161222. Its totient is φ = 2163466161220.

The previous prime is 2163466161191. The next prime is 2163466161247. The reversal of 2163466161221 is 1221616643612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1769884336900 + 393581824321 = 1330370^2 + 627361^2 .

It is a cyclic number.

It is not a de Polignac number, because 2163466161221 - 2³⁸ = 1888588254277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2163466161721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081733080610 + 1081733080611.

It is an arithmetic number, because the mean of its divisors is an integer number (1081733080611).

Almost surely, 2^{2163466161221} is an apocalyptic number.

It is an amenable number.

2163466161221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163466161221 is an equidigital number, since it uses as much as digits as its factorization.

2163466161221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The spelling of 2163466161221 in words is "two trillion, one hundred sixty-three billion, four hundred sixty-six million, one hundred sixty-one thousand, two hundred twenty-one".