442114211221 has 4 divisors (see below), whose sum is σ = 442590115500. Its totient is φ = 441638306944.

The previous prime is 442114211173. The next prime is 442114211237. The reversal of 442114211221 is 122112411244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58377324996 + 383736886225 = 241614^2 + 619465^2 .

It is a cyclic number.

It is not a de Polignac number, because 442114211221 - 2⁷ = 442114211093 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 (442114211251) 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, 237950746 + ... + 237952603.

It is an arithmetic number, because the mean of its divisors is an integer number (110647528875).

Almost surely, 2^442114211221 is an apocalyptic number.

It is an amenable number.

442114211221 is a deficient number, since it is larger than the sum of its proper divisors (475904279).

442114211221 is an equidigital number, since it uses as much as digits as its factorization.

442114211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475904278.

The product of its digits is 1024, while the sum is 25.

Adding to 442114211221 its reverse (122112411244), we get a palindrome (564226622465).

The spelling of 442114211221 in words is "four hundred forty-two billion, one hundred fourteen million, two hundred eleven thousand, two hundred twenty-one".