221042034021 has 8 divisors (see below), whose sum is σ = 297426590560. Its totient is φ = 146009416752.

The previous prime is 221042034019. The next prime is 221042034061. The reversal of 221042034021 is 120430240122.

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

It is not a de Polignac number, because 221042034021 - 2¹ = 221042034019 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 (221042034061) 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, 337984435 + ... + 337985088.

It is an arithmetic number, because the mean of its divisors is an integer number (37178323820).

Almost surely, 2^221042034021 is an apocalyptic number.

It is an amenable number.

221042034021 is a deficient number, since it is larger than the sum of its proper divisors (76384556539).

221042034021 is a wasteful number, since it uses less digits than its factorization.

221042034021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675969635.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 221042034021 its reverse (120430240122), we get a palindrome (341472274143).

The spelling of 221042034021 in words is "two hundred twenty-one billion, forty-two million, thirty-four thousand, twenty-one".