41997858022921 has 2 divisors, whose sum is σ = 41997858022922. Its totient is φ = 41997858022920.

The previous prime is 41997858022849. The next prime is 41997858022937. The reversal of 41997858022921 is 12922085879914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38658686547321 + 3339171475600 = 6217611^2 + 1827340^2 .

It is a cyclic number.

It is not a de Polignac number, because 41997858022921 - 2²³ = 41997849634313 is a prime.

It is a super-2 number, since 2×41997858022921² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (41997858022121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20998929011460 + 20998929011461.

It is an arithmetic number, because the mean of its divisors is an integer number (20998929011461).

Almost surely, 2^{41997858022921} is an apocalyptic number.

It is an amenable number.

41997858022921 is a deficient number, since it is larger than the sum of its proper divisors (1).

41997858022921 is an equidigital number, since it uses as much as digits as its factorization.

41997858022921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52254720, while the sum is 67.

The spelling of 41997858022921 in words is "forty-one trillion, nine hundred ninety-seven billion, eight hundred fifty-eight million, twenty-two thousand, nine hundred twenty-one".