442521125221 has 8 divisors (see below), whose sum is σ = 506269116864. Its totient is φ = 378905805600.

The previous prime is 442521125209. The next prime is 442521125261. The reversal of 442521125221 is 122521125244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-442521125221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442521125261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33160855 + ... + 33174196.

It is an arithmetic number, because the mean of its divisors is an integer number (63283639608).

Almost surely, 2^442521125221 is an apocalyptic number.

It is an amenable number.

442521125221 is a deficient number, since it is larger than the sum of its proper divisors (63747991643).

442521125221 is an equidigital number, since it uses as much as digits as its factorization.

442521125221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66336011.

The product of its digits is 12800, while the sum is 31.

The spelling of 442521125221 in words is "four hundred forty-two billion, five hundred twenty-one million, one hundred twenty-five thousand, two hundred twenty-one".