221743765201 has 4 divisors (see below), whose sum is σ = 253421445952. Its totient is φ = 190066084452.

The previous prime is 221743765189. The next prime is 221743765211. The reversal of 221743765201 is 102567347122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221743765201 - 2⁷ = 221743765073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221743765211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15838840365 + ... + 15838840378.

It is an arithmetic number, because the mean of its divisors is an integer number (63355361488).

Almost surely, 2^221743765201 is an apocalyptic number.

It is an amenable number.

221743765201 is a deficient number, since it is larger than the sum of its proper divisors (31677680751).

221743765201 is an equidigital number, since it uses as much as digits as its factorization.

221743765201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31677680750.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 221743765201 in words is "two hundred twenty-one billion, seven hundred forty-three million, seven hundred sixty-five thousand, two hundred one".