222112012121021 has 4 divisors (see below), whose sum is σ = 242304013222944. Its totient is φ = 201920011019100.

The previous prime is 222112012120991. The next prime is 222112012121063. The reversal of 222112012121021 is 120121210211222.

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 222112012121021 - 2¹⁰ = 222112012119997 is a prime.

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 = 222112012120984 and 222112012121002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222112012421021) 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, 10096000550945 + ... + 10096000550966.

It is an arithmetic number, because the mean of its divisors is an integer number (60576003305736).

Almost surely, 2^{222112012121021} is an apocalyptic number.

It is an amenable number.

222112012121021 is a deficient number, since it is larger than the sum of its proper divisors (20192001101923).

222112012121021 is a wasteful number, since it uses less digits than its factorization.

222112012121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20192001101922.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 222112012121021 its reverse (120121210211222), we get a palindrome (342233222332243).

The spelling of 222112012121021 in words is "two hundred twenty-two trillion, one hundred twelve billion, twelve million, one hundred twenty-one thousand, twenty-one".