22223212121 has 4 divisors (see below), whose sum is σ = 24243504144. Its totient is φ = 20202920100.

The previous prime is 22223212093. The next prime is 22223212129. The reversal of 22223212121 is 12121232222.

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 not a de Polignac number, because 22223212121 - 2¹⁰ = 22223211097 is a prime.

It is a super-2 number, since 2×22223212121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22223212093 and 22223212102.

It is not an unprimeable number, because it can be changed into a prime (22223212129) 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, 1010145995 + ... + 1010146016.

It is an arithmetic number, because the mean of its divisors is an integer number (6060876036).

Almost surely, 2^22223212121 is an apocalyptic number.

It is an amenable number.

22223212121 is a deficient number, since it is larger than the sum of its proper divisors (2020292023).

22223212121 is a wasteful number, since it uses less digits than its factorization.

22223212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020292022.

The product of its digits is 384, while the sum is 20.

Adding to 22223212121 its reverse (12121232222), we get a palindrome (34344444343).

The spelling of 22223212121 in words is "twenty-two billion, two hundred twenty-three million, two hundred twelve thousand, one hundred twenty-one".