222120201222021 has 4 divisors (see below), whose sum is σ = 296160268296032. Its totient is φ = 148080134148012.

The previous prime is 222120201221987. The next prime is 222120201222053. The reversal of 222120201222021 is 120222102021222.

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 de Polignac number, because none of the positive numbers 2^k-222120201222021 is a prime.

It is a super-2 number, since 2×222120201222021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222120201222091) 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, 37020033537001 + ... + 37020033537006.

It is an arithmetic number, because the mean of its divisors is an integer number (74040067074008).

Almost surely, 2^{222120201222021} is an apocalyptic number.

It is an amenable number.

222120201222021 is a deficient number, since it is larger than the sum of its proper divisors (74040067074011).

222120201222021 is an equidigital number, since it uses as much as digits as its factorization.

222120201222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74040067074010.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 222120201222021 its reverse (120222102021222), we get a palindrome (342342303243243).

The spelling of 222120201222021 in words is "two hundred twenty-two trillion, one hundred twenty billion, two hundred one million, two hundred twenty-two thousand, twenty-one".