221899960241 has 2 divisors, whose sum is σ = 221899960242. Its totient is φ = 221899960240.

The previous prime is 221899960237. The next prime is 221899960277. The reversal of 221899960241 is 142069998122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188412424225 + 33487536016 = 434065^2 + 182996^2 .

It is a cyclic number.

It is not a de Polignac number, because 221899960241 - 2² = 221899960237 is a prime.

It is not a weakly prime, because it can be changed into another prime (221899960741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110949980120 + 110949980121.

It is an arithmetic number, because the mean of its divisors is an integer number (110949980121).

Almost surely, 2^221899960241 is an apocalyptic number.

It is an amenable number.

221899960241 is a deficient number, since it is larger than the sum of its proper divisors (1).

221899960241 is an equidigital number, since it uses as much as digits as its factorization.

221899960241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 221899960241 in words is "two hundred twenty-one billion, eight hundred ninety-nine million, nine hundred sixty thousand, two hundred forty-one".