111121220010 has 32 divisors (see below), whose sum is σ = 266723775360. Its totient is φ = 29628675648.

The previous prime is 111121219879. The next prime is 111121220027. The reversal of 111121220010 is 10022121111.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24099 + ... + 472041.

It is an arithmetic number, because the mean of its divisors is an integer number (8335117980).

Almost surely, 2^111121220010 is an apocalyptic number.

111121220010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111121220010 is an abundant number, since it is smaller than the sum of its proper divisors (155602555350).

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

111121220010 is a wasteful number, since it uses less digits than its factorization.

111121220010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456222.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111121220010 its reverse (10022121111), we get a palindrome (121143341121).

The spelling of 111121220010 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred twenty thousand, ten".