111220121222100 has 216 divisors, whose sum is σ = 381433922583168. Its totient is φ = 26882445542400.

The previous prime is 111220121222053. The next prime is 111220121222167. The reversal of 111220121222100 is 1222121022111.

111220121222100 is a `hidden beast` number, since 1 + 1 + 1 + 220 + 121 + 222 + 100 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 13331884 + ... + 20004483.

Almost surely, 2^{111220121222100} is an apocalyptic number.

111220121222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111220121222100 is an abundant number, since it is smaller than the sum of its proper divisors (270213801361068).

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

111220121222100 is a wasteful number, since it uses less digits than its factorization.

111220121222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33336735 (or 33336725 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111220121222100 its reverse (1222121022111), we get a palindrome (112442242244211).

The spelling of 111220121222100 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred".