222211022021 has 4 divisors (see below), whose sum is σ = 222255020544. Its totient is φ = 222167023500.

The previous prime is 222211021931. The next prime is 222211022023. The reversal of 222211022021 is 120220112222.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 222211022021 - 2¹⁸ = 222210759877 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 (222211022023) 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, 21991685 + ... + 22001786.

It is an arithmetic number, because the mean of its divisors is an integer number (55563755136).

Almost surely, 2^222211022021 is an apocalyptic number.

It is an amenable number.

222211022021 is a deficient number, since it is larger than the sum of its proper divisors (43998523).

222211022021 is an equidigital number, since it uses as much as digits as its factorization.

222211022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43998522.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222211022021 its reverse (120220112222), we get a palindrome (342431134243).

The spelling of 222211022021 in words is "two hundred twenty-two billion, two hundred eleven million, twenty-two thousand, twenty-one".