442101045031221 has 4 divisors (see below), whose sum is σ = 589468060041632. Its totient is φ = 294734030020812.

The previous prime is 442101045031213. The next prime is 442101045031241. The reversal of 442101045031221 is 122130540101244.

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 not a de Polignac number, because 442101045031221 - 2³ = 442101045031213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442101045031241) 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, 73683507505201 + ... + 73683507505206.

It is an arithmetic number, because the mean of its divisors is an integer number (147367015010408).

Almost surely, 2^{442101045031221} is an apocalyptic number.

It is an amenable number.

442101045031221 is a deficient number, since it is larger than the sum of its proper divisors (147367015010411).

442101045031221 is a wasteful number, since it uses less digits than its factorization.

442101045031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147367015010410.

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 442101045031221 its reverse (122130540101244), we get a palindrome (564231585132465).

The spelling of 442101045031221 in words is "four hundred forty-two trillion, one hundred one billion, forty-five million, thirty-one thousand, two hundred twenty-one".