111201220100 has 18 divisors (see below), whose sum is σ = 241306647834. Its totient is φ = 44480488000.

The previous prime is 111201220051. The next prime is 111201220103. The reversal of 111201220100 is 1022102111.

It can be written as a sum of positive squares in 3 ways, for example, as 785905156 + 110415314944 = 28034^2 + 332288^2 .

It is a super-2 number, since 2×111201220100² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111201220103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556006001 + ... + 556006200.

Almost surely, 2^111201220100 is an apocalyptic number.

111201220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111201220100 is an abundant number, since it is smaller than the sum of its proper divisors (130105427734).

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

111201220100 is a wasteful number, since it uses less digits than its factorization.

111201220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112012215 (or 1112012208 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111201220100 its reverse (1022102111), we get a palindrome (112223322211).

The spelling of 111201220100 in words is "one hundred eleven billion, two hundred one million, two hundred twenty thousand, one hundred".