113222221220 has 48 divisors (see below), whose sum is σ = 252852470640. Its totient is φ = 42438672384.

The previous prime is 113222221219. The next prime is 113222221223. The reversal of 113222221220 is 22122222311.

It can be written as a sum of positive squares in 8 ways, for example, as 24294209956 + 88928011264 = 155866^2 + 298208^2 .

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 = 113222221192 and 113222221201.

It is not an unprimeable number, because it can be changed into a prime (113222221223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649229 + ... + 804948.

It is an arithmetic number, because the mean of its divisors is an integer number (5267759805).

Almost surely, 2^113222221220 is an apocalyptic number.

113222221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113222221220 is an abundant number, since it is smaller than the sum of its proper divisors (139630249420).

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

113222221220 is a wasteful number, since it uses less digits than its factorization.

113222221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454432 (or 1454430 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 113222221220 its reverse (22122222311), we get a palindrome (135344443531).

The spelling of 113222221220 in words is "one hundred thirteen billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty".