111141421220 has 96 divisors (see below), whose sum is σ = 248350717440. Its totient is φ = 41634754560.

The previous prime is 111141421189. The next prime is 111141421249. The reversal of 111141421220 is 22124141111.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 111141421192 and 111141421201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86222336 + ... + 86223624.

It is an arithmetic number, because the mean of its divisors is an integer number (2586986640).

Almost surely, 2^111141421220 is an apocalyptic number.

111141421220 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 111141421220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124175358720).

111141421220 is an abundant number, since it is smaller than the sum of its proper divisors (137209296220).

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

111141421220 is a wasteful number, since it uses less digits than its factorization.

111141421220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373 (or 2371 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111141421220 its reverse (22124141111), we get a palindrome (133265562331).

The spelling of 111141421220 in words is "one hundred eleven billion, one hundred forty-one million, four hundred twenty-one thousand, two hundred twenty".