222211221210021 has 16 divisors (see below), whose sum is σ = 298268907171840. Its totient is φ = 147149445872880.

The previous prime is 222211221209981. The next prime is 222211221210059. The reversal of 222211221210021 is 120012122112222.

222211221210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 222211221210021 - 2¹⁹ = 222211220685733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222211221210021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222211221215021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283505551 + ... + 284288268.

It is an arithmetic number, because the mean of its divisors is an integer number (18641806698240).

Almost surely, 2^{222211221210021} is an apocalyptic number.

It is an amenable number.

222211221210021 is a deficient number, since it is larger than the sum of its proper divisors (76057685961819).

222211221210021 is a wasteful number, since it uses less digits than its factorization.

222211221210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567794696.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222211221210021 its reverse (120012122112222), we get a palindrome (342223343322243).

The spelling of 222211221210021 in words is "two hundred twenty-two trillion, two hundred eleven billion, two hundred twenty-one million, two hundred ten thousand, twenty-one".