22222220112021 has 16 divisors (see below), whose sum is σ = 30201648915200. Its totient is φ = 14530194141120.

The previous prime is 22222220111989. The next prime is 22222220112121. The reversal of 22222220112021 is 12021102222222.

It is not a de Polignac number, because 22222220112021 - 2⁵ = 22222220111989 is a prime.

It is a super-2 number, since 2×22222220112021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222220112121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173908765 + ... + 174036498.

It is an arithmetic number, because the mean of its divisors is an integer number (1887603057200).

Almost surely, 2^{22222220112021} is an apocalyptic number.

It is an amenable number.

22222220112021 is a deficient number, since it is larger than the sum of its proper divisors (7979428803179).

22222220112021 is a wasteful number, since it uses less digits than its factorization.

22222220112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347945676.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22222220112021 its reverse (12021102222222), we get a palindrome (34243322334243).

The spelling of 22222220112021 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twenty million, one hundred twelve thousand, twenty-one".