111221210011020 has 24 divisors (see below), whose sum is σ = 311419388031024. Its totient is φ = 29658989336256.

The previous prime is 111221210010997. The next prime is 111221210011111. The reversal of 111221210011020 is 20110012122111.

It is a happy number.

111221210011020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 926843416699 + ... + 926843416818.

It is an arithmetic number, because the mean of its divisors is an integer number (12975807834626).

Almost surely, 2^{111221210011020} is an apocalyptic number.

111221210011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221210011020 is an abundant number, since it is smaller than the sum of its proper divisors (200198178020004).

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

111221210011020 is a wasteful number, since it uses less digits than its factorization.

111221210011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853686833529 (or 1853686833527 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111221210011020 its reverse (20110012122111), we get a palindrome (131331222133131).

The spelling of 111221210011020 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred ten million, eleven thousand, twenty".