111101122210 has 48 divisors (see below), whose sum is σ = 229286788776. Its totient is φ = 38608886784.

The previous prime is 111101122199. The next prime is 111101122241. The reversal of 111101122210 is 12221101111.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 4350589681 + 106750532529 = 65959^2 + 326727^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1904809 + ... + 1962268.

Almost surely, 2^111101122210 is an apocalyptic number.

111101122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111101122210 is an abundant number, since it is smaller than the sum of its proper divisors (118185666566).

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

111101122210 is a wasteful number, since it uses less digits than its factorization.

111101122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867127 (or 3867114 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111101122210 its reverse (12221101111), we get a palindrome (123322223321).

The spelling of 111101122210 in words is "one hundred eleven billion, one hundred one million, one hundred twenty-two thousand, two hundred ten".