222122321021 has 4 divisors (see below), whose sum is σ = 222124610652. Its totient is φ = 222120031392.

The previous prime is 222122321009. The next prime is 222122321027. The reversal of 222122321021 is 120123221222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 219034296121 + 3088024900 = 468011^2 + 55570^2 .

It is a cyclic number.

It is not a de Polignac number, because 222122321021 - 2¹⁰ = 222122319997 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 = 222122320984 and 222122321002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222122321027) 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, 992546 + ... + 1195571.

It is an arithmetic number, because the mean of its divisors is an integer number (55531152663).

Almost surely, 2^222122321021 is an apocalyptic number.

It is an amenable number.

222122321021 is a deficient number, since it is larger than the sum of its proper divisors (2289631).

222122321021 is a wasteful number, since it uses less digits than its factorization.

222122321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289630.

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

Adding to 222122321021 its reverse (120123221222), we get a palindrome (342245542243).

The spelling of 222122321021 in words is "two hundred twenty-two billion, one hundred twenty-two million, three hundred twenty-one thousand, twenty-one".