220111021278 has 96 divisors (see below), whose sum is σ = 514871510400. Its totient is φ = 67706311680.

The previous prime is 220111021183. The next prime is 220111021279. The reversal of 220111021278 is 872120111022.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220111021279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5898523 + ... + 5935721.

It is an arithmetic number, because the mean of its divisors is an integer number (5363244900).

Almost surely, 2^220111021278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220111021278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257435755200).

220111021278 is an abundant number, since it is smaller than the sum of its proper divisors (294760489122).

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

220111021278 is a wasteful number, since it uses less digits than its factorization.

220111021278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37602 (or 37599 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The spelling of 220111021278 in words is "two hundred twenty billion, one hundred eleven million, twenty-one thousand, two hundred seventy-eight".