111212021012209 has 16 divisors (see below), whose sum is σ = 121464946842624. Its totient is φ = 101203021123200.

The previous prime is 111212021012171. The next prime is 111212021012249. The reversal of 111212021012209 is 902210120212111.

It is a cyclic number.

It is not a de Polignac number, because 111212021012209 - 2³⁹ = 110662265198321 is a prime.

It is a super-2 number, since 2×111212021012209² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111212021012249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25753327 + ... + 29760004.

It is an arithmetic number, because the mean of its divisors is an integer number (7591559177664).

Almost surely, 2^{111212021012209} is an apocalyptic number.

It is an amenable number.

111212021012209 is a deficient number, since it is larger than the sum of its proper divisors (10252925830415).

111212021012209 is a wasteful number, since it uses less digits than its factorization.

111212021012209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55515528.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 111212021012209 in words is "one hundred eleven trillion, two hundred twelve billion, twenty-one million, twelve thousand, two hundred nine".