111021222220 has 24 divisors (see below), whose sum is σ = 233170989408. Its totient is φ = 44403456000.

The previous prime is 111021222217. The next prime is 111021222287. The reversal of 111021222220 is 22222120111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111021222194 and 111021222203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131061 + ... + 489100.

It is an arithmetic number, because the mean of its divisors is an integer number (9715457892).

Almost surely, 2^111021222220 is an apocalyptic number.

111021222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021222220 is an abundant number, since it is smaller than the sum of its proper divisors (122149767188).

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

111021222220 is a wasteful number, since it uses less digits than its factorization.

111021222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629121 (or 629119 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 111021222220 its reverse (22222120111), we get a palindrome (133243342331).

The spelling of 111021222220 in words is "one hundred eleven billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty".