22212122212121 has 4 divisors (see below), whose sum is σ = 22273994419200. Its totient is φ = 22150250005044.

The previous prime is 22212122212109. The next prime is 22212122212127. The reversal of 22212122212121 is 12121222121222.

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 22212122212121 - 2¹⁸ = 22212121949977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22212122212127) 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, 30936103001 + ... + 30936103718.

It is an arithmetic number, because the mean of its divisors is an integer number (5568498604800).

Almost surely, 2^{22212122212121} is an apocalyptic number.

It is an amenable number.

22212122212121 is a deficient number, since it is larger than the sum of its proper divisors (61872207079).

22212122212121 is an equidigital number, since it uses as much as digits as its factorization.

22212122212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61872207078.

The product of its digits is 512, while the sum is 23.

Adding to 22212122212121 its reverse (12121222121222), we get a palindrome (34333344333343).

The spelling of 22212122212121 in words is "twenty-two trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twelve thousand, one hundred twenty-one".