4222165211221 has 4 divisors (see below), whose sum is σ = 4281632326944. Its totient is φ = 4162698095500.

The previous prime is 4222165211167. The next prime is 4222165211237. The reversal of 4222165211221 is 1221125612224.

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 4222165211221 - 2¹⁷ = 4222165080149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4222165211261) 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, 29733557755 + ... + 29733557896.

It is an arithmetic number, because the mean of its divisors is an integer number (1070408081736).

Almost surely, 2^{4222165211221} is an apocalyptic number.

It is an amenable number.

4222165211221 is a deficient number, since it is larger than the sum of its proper divisors (59467115723).

4222165211221 is an equidigital number, since it uses as much as digits as its factorization.

4222165211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59467115722.

The product of its digits is 7680, while the sum is 31.

The spelling of 4222165211221 in words is "four trillion, two hundred twenty-two billion, one hundred sixty-five million, two hundred eleven thousand, two hundred twenty-one".