222221010021 has 32 divisors (see below), whose sum is σ = 309251520000. Its totient is φ = 141765808128.

The previous prime is 222221009977. The next prime is 222221010041. The reversal of 222221010021 is 120010122222.

It is not a de Polignac number, because 222221010021 - 2¹¹ = 222221007973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221010041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4492180 + ... + 4541378.

It is an arithmetic number, because the mean of its divisors is an integer number (9664110000).

Almost surely, 2^222221010021 is an apocalyptic number.

It is an amenable number.

222221010021 is a deficient number, since it is larger than the sum of its proper divisors (87030509979).

222221010021 is a wasteful number, since it uses less digits than its factorization.

222221010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49693.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 222221010021 its reverse (120010122222), we get a palindrome (342231132243).

The spelling of 222221010021 in words is "two hundred twenty-two billion, two hundred twenty-one million, ten thousand, twenty-one".