222121301021 has 4 divisors (see below), whose sum is σ = 222131776512. Its totient is φ = 222110825532.

The previous prime is 222121300997. The next prime is 222121301041. The reversal of 222121301021 is 120103121222.

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 222121301021 - 2⁶ = 222121300957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121301041) 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, 5205875 + ... + 5248368.

It is an arithmetic number, because the mean of its divisors is an integer number (55532944128).

Almost surely, 2^222121301021 is an apocalyptic number.

It is an amenable number.

222121301021 is a deficient number, since it is larger than the sum of its proper divisors (10475491).

222121301021 is a wasteful number, since it uses less digits than its factorization.

222121301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10475490.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 222121301021 its reverse (120103121222), we get a palindrome (342224422243).

The spelling of 222121301021 in words is "two hundred twenty-two billion, one hundred twenty-one million, three hundred one thousand, twenty-one".