111212021111012 has 12 divisors (see below), whose sum is σ = 194621180992896. Its totient is φ = 55605969398760.

The previous prime is 111212021110997. The next prime is 111212021111033. The reversal of 111212021111012 is 210111120212111.

It is a super-2 number, since 2×111212021111012² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3747164 + ... + 15377427.

It is an arithmetic number, because the mean of its divisors is an integer number (16218431749408).

Almost surely, 2^{111212021111012} is an apocalyptic number.

It is an amenable number.

111212021111012 is a deficient number, since it is larger than the sum of its proper divisors (83409159881884).

111212021111012 is a wasteful number, since it uses less digits than its factorization.

111212021111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20578378 (or 20578376 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111212021111012 its reverse (210111120212111), we get a palindrome (321323141323123).

The spelling of 111212021111012 in words is "one hundred eleven trillion, two hundred twelve billion, twenty-one million, one hundred eleven thousand, twelve".