111012101221209 has 4 divisors (see below), whose sum is σ = 148016134961616. Its totient is φ = 74008067480804.

The previous prime is 111012101221193. The next prime is 111012101221283. The reversal of 111012101221209 is 902122101210111.

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 111012101221209 - 2⁴ = 111012101221193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111012101221289) 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, 18502016870199 + ... + 18502016870204.

It is an arithmetic number, because the mean of its divisors is an integer number (37004033740404).

Almost surely, 2^{111012101221209} is an apocalyptic number.

It is an amenable number.

111012101221209 is a deficient number, since it is larger than the sum of its proper divisors (37004033740407).

111012101221209 is an equidigital number, since it uses as much as digits as its factorization.

111012101221209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37004033740406.

The product of its (nonzero) digits is 144, while the sum is 24.

The spelling of 111012101221209 in words is "one hundred eleven trillion, twelve billion, one hundred one million, two hundred twenty-one thousand, two hundred nine".