222212211121021 has 4 divisors (see below), whose sum is σ = 242413321222944. Its totient is φ = 202011101019100.

The previous prime is 222212211120971. The next prime is 222212211121051. The reversal of 222212211121021 is 120121112212222.

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 a de Polignac number, because none of the positive numbers 2^k-222212211121021 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222212211120983 and 222212211121001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222212211121051) 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, 10100555050945 + ... + 10100555050966.

It is an arithmetic number, because the mean of its divisors is an integer number (60603330305736).

Almost surely, 2^{222212211121021} is an apocalyptic number.

It is an amenable number.

222212211121021 is a deficient number, since it is larger than the sum of its proper divisors (20201110101923).

222212211121021 is a wasteful number, since it uses less digits than its factorization.

222212211121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20201110101922.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 222212211121021 its reverse (120121112212222), we get a palindrome (342333323333243).

The spelling of 222212211121021 in words is "two hundred twenty-two trillion, two hundred twelve billion, two hundred eleven million, one hundred twenty-one thousand, twenty-one".