22222102421 has 4 divisors (see below), whose sum is σ = 22586399244. Its totient is φ = 21857805600.

The previous prime is 22222102387. The next prime is 22222102439. The reversal of 22222102421 is 12420122222.

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 12834624100 + 9387478321 = 113290^2 + 96889^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222102421 - 2¹⁰ = 22222101397 is a prime.

It is a super-2 number, since 2×22222102421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22222102393 and 22222102402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222102621) 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, 182148320 + ... + 182148441.

It is an arithmetic number, because the mean of its divisors is an integer number (5646599811).

Almost surely, 2^22222102421 is an apocalyptic number.

It is an amenable number.

22222102421 is a deficient number, since it is larger than the sum of its proper divisors (364296823).

22222102421 is an equidigital number, since it uses as much as digits as its factorization.

22222102421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364296822.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22222102421 its reverse (12420122222), we get a palindrome (34642224643).

The spelling of 22222102421 in words is "twenty-two billion, two hundred twenty-two million, one hundred two thousand, four hundred twenty-one".