111212001210109 has 4 divisors (see below), whose sum is σ = 111223415774016. Its totient is φ = 111200586646204.

The previous prime is 111212001210043. The next prime is 111212001210161. The reversal of 111212001210109 is 901012100212111.

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 a de Polignac number, because none of the positive numbers 2^k-111212001210109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111212001210109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212001214109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5707267339 + ... + 5707286824.

It is an arithmetic number, because the mean of its divisors is an integer number (27805853943504).

Almost surely, 2^{111212001210109} is an apocalyptic number.

It is an amenable number.

111212001210109 is a deficient number, since it is larger than the sum of its proper divisors (11414563907).

111212001210109 is an equidigital number, since it uses as much as digits as its factorization.

111212001210109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11414563906.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 111212001210109 in words is "one hundred eleven trillion, two hundred twelve billion, one million, two hundred ten thousand, one hundred nine".