111101221010 has 64 divisors (see below), whose sum is σ = 224823126528. Its totient is φ = 39222019584.

The previous prime is 111101221003. The next prime is 111101221019. The reversal of 111101221010 is 10122101111.

It is a junction number, because it is equal to n+sod(n) for n = 111101220982 and 111101221000.

It is not an unprimeable number, because it can be changed into a prime (111101221019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8823179 + ... + 8835761.

It is an arithmetic number, because the mean of its divisors is an integer number (3512861352).

Almost surely, 2^111101221010 is an apocalyptic number.

111101221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111101221010 is an abundant number, since it is smaller than the sum of its proper divisors (113721905518).

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

111101221010 is a wasteful number, since it uses less digits than its factorization.

111101221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15579.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111101221010 its reverse (10122101111), we get a palindrome (121223322121).

The spelling of 111101221010 in words is "one hundred eleven billion, one hundred one million, two hundred twenty-one thousand, ten".