111121020212100 has 144 divisors (see below), whose sum is σ = 335610454556160. Its totient is φ = 28354185446400.

The previous prime is 111121020211991. The next prime is 111121020212113. The reversal of 111121020212100 is 1212020121111.

It is a happy number.

It is a super-2 number, since 2×111121020212100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111121020212100.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66298687 + ... + 67954086.

It is an arithmetic number, because the mean of its divisors is an integer number (2330628156640).

Almost surely, 2^{111121020212100} is an apocalyptic number.

111121020212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111121020212100 is an abundant number, since it is smaller than the sum of its proper divisors (224489434344060).

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

111121020212100 is a wasteful number, since it uses less digits than its factorization.

111121020212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134252910 (or 134252903 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111121020212100 its reverse (1212020121111), we get a palindrome (112333040333211).

The spelling of 111121020212100 in words is "one hundred eleven trillion, one hundred twenty-one billion, twenty million, two hundred twelve thousand, one hundred".