2123817990241 has 2 divisors, whose sum is σ = 2123817990242. Its totient is φ = 2123817990240.

The previous prime is 2123817990149. The next prime is 2123817990247. The reversal of 2123817990241 is 1420997183212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1883591553600 + 240226436641 = 1372440^2 + 490129^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123817990241 - 2⁷ = 2123817990113 is a prime.

It is not a weakly prime, because it can be changed into another prime (2123817990247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061908995120 + 1061908995121.

It is an arithmetic number, because the mean of its divisors is an integer number (1061908995121).

Almost surely, 2^{2123817990241} is an apocalyptic number.

It is an amenable number.

2123817990241 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123817990241 is an equidigital number, since it uses as much as digits as its factorization.

2123817990241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 2123817990241 in words is "two trillion, one hundred twenty-three billion, eight hundred seventeen million, nine hundred ninety thousand, two hundred forty-one".