111010021011220 has 48 divisors (see below), whose sum is σ = 236951420419728. Its totient is φ = 43674466498560.

The previous prime is 111010021011179. The next prime is 111010021011221. The reversal of 111010021011220 is 22110120010111.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 15084803495056 + 95925217516164 = 3883916^2 + 9794142^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111010021011220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111010021011221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31763724 + ... + 35084956.

It is an arithmetic number, because the mean of its divisors is an integer number (4936487925411).

Almost surely, 2^{111010021011220} is an apocalyptic number.

111010021011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111010021011220 is an abundant number, since it is smaller than the sum of its proper divisors (125941399408508).

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

111010021011220 is a wasteful number, since it uses less digits than its factorization.

111010021011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3348700 (or 3348698 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111010021011220 its reverse (22110120010111), we get a palindrome (133120141021331).

The spelling of 111010021011220 in words is "one hundred eleven trillion, ten billion, twenty-one million, eleven thousand, two hundred twenty".