222120001001 has 4 divisors (see below), whose sum is σ = 222289948752. Its totient is φ = 221950053252.

The previous prime is 222120000943. The next prime is 222120001003. The reversal of 222120001001 is 100100021222.

It is a happy number.

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 222120001001 - 2²² = 222115806697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222120001003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84971915 + ... + 84974528.

It is an arithmetic number, because the mean of its divisors is an integer number (55572487188).

Almost surely, 2^222120001001 is an apocalyptic number.

It is an amenable number.

222120001001 is a deficient number, since it is larger than the sum of its proper divisors (169947751).

222120001001 is a wasteful number, since it uses less digits than its factorization.

222120001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169947750.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 222120001001 its reverse (100100021222), we get a palindrome (322220022223).

The spelling of 222120001001 in words is "two hundred twenty-two billion, one hundred twenty million, one thousand, one".