111012211221012 has 48 divisors (see below), whose sum is σ = 287822775078720. Its totient is φ = 37002355446816.

The previous prime is 111012211220983. The next prime is 111012211221013. The reversal of 111012211221012 is 210122112210111.

It is a happy number.

It is a super-2 number, since 2×111012211221012² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012211221013) 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, 21476703 + ... + 26139494.

It is an arithmetic number, because the mean of its divisors is an integer number (5996307814140).

Almost surely, 2^{111012211221012} is an apocalyptic number.

111012211221012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111012211221012 is an abundant number, since it is smaller than the sum of its proper divisors (176810563857708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111012211221012 is a wasteful number, since it uses less digits than its factorization.

111012211221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47637797 (or 47637789 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111012211221012 its reverse (210122112210111), we get a palindrome (321134323431123).

The spelling of 111012211221012 in words is "one hundred eleven trillion, twelve billion, two hundred eleven million, two hundred twenty-one thousand, twelve".