22222002011021 has 4 divisors (see below), whose sum is σ = 22224936390972. Its totient is φ = 22219067631072.

The previous prime is 22222002010993. The next prime is 22222002011029. The reversal of 22222002011021 is 12011020022222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21735829108900 + 486172902121 = 4662170^2 + 697261^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222002011021 - 2¹⁴ = 22222001994637 is a prime.

It is a super-4 number, since 4×22222002011021⁴ (a number of 54 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222002011029) 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, 1467178616 + ... + 1467193761.

It is an arithmetic number, because the mean of its divisors is an integer number (5556234097743).

Almost surely, 2^{22222002011021} is an apocalyptic number.

It is an amenable number.

22222002011021 is a deficient number, since it is larger than the sum of its proper divisors (2934379951).

22222002011021 is an equidigital number, since it uses as much as digits as its factorization.

22222002011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934379950.

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

Adding to 22222002011021 its reverse (12011020022222), we get a palindrome (34233022033243).

The spelling of 22222002011021 in words is "twenty-two trillion, two hundred twenty-two billion, two million, eleven thousand, twenty-one".