222231021 has 8 divisors (see below), whose sum is σ = 313737984. Its totient is φ = 139439040.

The previous prime is 222231017. The next prime is 222231041. The reversal of 222231021 is 120132222.

It is a happy number.

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

It is not a de Polignac number, because 222231021 - 2² = 222231017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222231001) 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, 2178685 + ... + 2178786.

It is an arithmetic number, because the mean of its divisors is an integer number (39217248).

Almost surely, 2^222231021 is an apocalyptic number.

It is an amenable number.

222231021 is a deficient number, since it is larger than the sum of its proper divisors (91506963).

222231021 is a wasteful number, since it uses less digits than its factorization.

222231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4357491.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 222231021 is about 14907.4149670558. The cubic root of 222231021 is about 605.7148583920.

Adding to 222231021 its reverse (120132222), we get a palindrome (342363243).

The spelling of 222231021 in words is "two hundred twenty-two million, two hundred thirty-one thousand, twenty-one".