111102121220 has 12 divisors (see below), whose sum is σ = 233314454604. Its totient is φ = 44440848480.

The previous prime is 111102121219. The next prime is 111102121243. The reversal of 111102121220 is 22121201111.

It can be written as a sum of positive squares in 2 ways, for example, as 57373662784 + 53728458436 = 239528^2 + 231794^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111102121195 and 111102121204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777553011 + ... + 2777553050.

It is an arithmetic number, because the mean of its divisors is an integer number (19442871217).

Almost surely, 2^111102121220 is an apocalyptic number.

111102121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111102121220 is an abundant number, since it is smaller than the sum of its proper divisors (122212333384).

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

111102121220 is a wasteful number, since it uses less digits than its factorization.

111102121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555106070 (or 5555106068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111102121220 its reverse (22121201111), we get a palindrome (133223322331).

The spelling of 111102121220 in words is "one hundred eleven billion, one hundred two million, one hundred twenty-one thousand, two hundred twenty".