111212222109 has 4 divisors (see below), whose sum is σ = 148282962816. Its totient is φ = 74141481404.

The previous prime is 111212222057. The next prime is 111212222111. The reversal of 111212222109 is 901222212111.

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 111212222109 - 2²³ = 111203833501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212222129) 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, 18535370349 + ... + 18535370354.

It is an arithmetic number, because the mean of its divisors is an integer number (37070740704).

Almost surely, 2^111212222109 is an apocalyptic number.

It is an amenable number.

111212222109 is a deficient number, since it is larger than the sum of its proper divisors (37070740707).

111212222109 is an equidigital number, since it uses as much as digits as its factorization.

111212222109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37070740706.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 111212222109 in words is "one hundred eleven billion, two hundred twelve million, two hundred twenty-two thousand, one hundred nine".