111220010020 has 48 divisors (see below), whose sum is σ = 267458865408. Its totient is φ = 38056740480.

The previous prime is 111220010017. The next prime is 111220010113. The reversal of 111220010020 is 20010022111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 111220009979 and 111220010006.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 719271 + ... + 860110.

It is an arithmetic number, because the mean of its divisors is an integer number (5572059696).

Almost surely, 2^111220010020 is an apocalyptic number.

111220010020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111220010020 is an abundant number, since it is smaller than the sum of its proper divisors (156238855388).

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

111220010020 is a wasteful number, since it uses less digits than its factorization.

111220010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579900 (or 1579898 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 111220010020 its reverse (20010022111), we get a palindrome (131230032131).

The spelling of 111220010020 in words is "one hundred eleven billion, two hundred twenty million, ten thousand, twenty".