222120222121021 has 4 divisors (see below), whose sum is σ = 253851682424032. Its totient is φ = 190388761818012.

The previous prime is 222120222121019. The next prime is 222120222121033. The reversal of 222120222121021 is 120121222021222.

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 222120222121021 - 2¹ = 222120222121019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222120222120983 and 222120222121001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222120222121081) 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, 15865730151495 + ... + 15865730151508.

It is an arithmetic number, because the mean of its divisors is an integer number (63462920606008).

Almost surely, 2^{222120222121021} is an apocalyptic number.

It is an amenable number.

222120222121021 is a deficient number, since it is larger than the sum of its proper divisors (31731460303011).

222120222121021 is an equidigital number, since it uses as much as digits as its factorization.

222120222121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31731460303010.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222120222121021 its reverse (120121222021222), we get a palindrome (342241444142243).

The spelling of 222120222121021 in words is "two hundred twenty-two trillion, one hundred twenty billion, two hundred twenty-two million, one hundred twenty-one thousand, twenty-one".