111321211122220 has 48 divisors (see below), whose sum is σ = 255027492131328. Its totient is φ = 40480326509760.

The previous prime is 111321211122203. The next prime is 111321211122223. The reversal of 111321211122220 is 22221112123111.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 111321211122191 and 111321211122200.

It is not an unprimeable number, because it can be changed into a prime (111321211122223) 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, 150230749 + ... + 150969931.

It is an arithmetic number, because the mean of its divisors is an integer number (5313072752736).

Almost surely, 2^{111321211122220} is an apocalyptic number.

111321211122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111321211122220 is an abundant number, since it is smaller than the sum of its proper divisors (143706281009108).

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

111321211122220 is a wasteful number, since it uses less digits than its factorization.

111321211122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423750 (or 1423748 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 111321211122220 its reverse (22221112123111), we get a palindrome (133542323245331).

The spelling of 111321211122220 in words is "one hundred eleven trillion, three hundred twenty-one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twenty".