111421400220 has 144 divisors (see below), whose sum is σ = 366843509760. Its totient is φ = 27210774528.

The previous prime is 111421400197. The next prime is 111421400243. The reversal of 111421400220 is 22004124111.

111421400220 is a `hidden beast` number, since 1 + 1 + 1 + 42 + 1 + 400 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (111421400197) and next prime (111421400243).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111421400193 and 111421400202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109716 + ... + 484644.

Almost surely, 2^111421400220 is an apocalyptic number.

111421400220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111421400220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183421754880).

111421400220 is an abundant number, since it is smaller than the sum of its proper divisors (255422109540).

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

111421400220 is a wasteful number, since it uses less digits than its factorization.

111421400220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375084 (or 375079 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 111421400220 its reverse (22004124111), we get a palindrome (133425524331).

The spelling of 111421400220 in words is "one hundred eleven billion, four hundred twenty-one million, four hundred thousand, two hundred twenty".