111131222010 has 64 divisors (see below), whose sum is σ = 274229190144. Its totient is φ = 28805414400.

The previous prime is 111131221979. The next prime is 111131222023. The reversal of 111131222010 is 10222131111.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166632 + ... + 500028.

It is an arithmetic number, because the mean of its divisors is an integer number (4284831096).

Almost surely, 2^111131222010 is an apocalyptic number.

111131222010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111131222010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137114595072).

111131222010 is an abundant number, since it is smaller than the sum of its proper divisors (163097968134).

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

111131222010 is a wasteful number, since it uses less digits than its factorization.

111131222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333719.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 111131222010 its reverse (10222131111), we get a palindrome (121353353121).

The spelling of 111131222010 in words is "one hundred eleven billion, one hundred thirty-one million, two hundred twenty-two thousand, ten".