222100021109 has 4 divisors (see below), whose sum is σ = 222659467404. Its totient is φ = 221540574816.

The previous prime is 222100021007. The next prime is 222100021147. The reversal of 222100021109 is 901120001222.

It is a happy number.

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 111274282084 + 110825739025 = 333578^2 + 332905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222100021109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222100021189) 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, 279722552 + ... + 279723345.

It is an arithmetic number, because the mean of its divisors is an integer number (55664866851).

Almost surely, 2^222100021109 is an apocalyptic number.

It is an amenable number.

222100021109 is a deficient number, since it is larger than the sum of its proper divisors (559446295).

222100021109 is an equidigital number, since it uses as much as digits as its factorization.

222100021109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559446294.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 222100021109 in words is "two hundred twenty-two billion, one hundred million, twenty-one thousand, one hundred nine".