111012001220 has 12 divisors (see below), whose sum is σ = 233125202604. Its totient is φ = 44404800480.

The previous prime is 111012001201. The next prime is 111012001241. The reversal of 111012001220 is 22100210111.

It can be written as a sum of positive squares in 2 ways, for example, as 82497626176 + 28514375044 = 287224^2 + 168862^2 .

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, 2775300011 + ... + 2775300050.

It is an arithmetic number, because the mean of its divisors is an integer number (19427100217).

Almost surely, 2^111012001220 is an apocalyptic number.

111012001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111012001220 is an abundant number, since it is smaller than the sum of its proper divisors (122113201384).

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

111012001220 is a wasteful number, since it uses less digits than its factorization.

111012001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550600070 (or 5550600068 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111012001220 its reverse (22100210111), we get a palindrome (133112211331).

The spelling of 111012001220 in words is "one hundred eleven billion, twelve million, one thousand, two hundred twenty".