221240240369 has 2 divisors, whose sum is σ = 221240240370. Its totient is φ = 221240240368.

The previous prime is 221240240359. The next prime is 221240240381. The reversal of 221240240369 is 963042042122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184332835600 + 36907404769 = 429340^2 + 192113^2 .

It is a cyclic number.

It is not a de Polignac number, because 221240240369 - 2¹⁶ = 221240174833 is a prime.

It is a super-2 number, since 2×221240240369² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221240240359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110620120184 + 110620120185.

It is an arithmetic number, because the mean of its divisors is an integer number (110620120185).

Almost surely, 2^221240240369 is an apocalyptic number.

It is an amenable number.

221240240369 is a deficient number, since it is larger than the sum of its proper divisors (1).

221240240369 is an equidigital number, since it uses as much as digits as its factorization.

221240240369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 221240240369 in words is "two hundred twenty-one billion, two hundred forty million, two hundred forty thousand, three hundred sixty-nine".