222120121320 has 160 divisors (see below), whose sum is σ = 755566146720. Its totient is φ = 58518322560.

The previous prime is 222120121309. The next prime is 222120121373. The reversal of 222120121320 is 23121021222.

222120121320 is a `hidden beast` number, since 2 + 221 + 2 + 0 + 121 + 320 = 666.

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 = 222120121293 and 222120121302.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 144066 + ... + 681905.

It is an arithmetic number, because the mean of its divisors is an integer number (4722288417).

Almost surely, 2^222120121320 is an apocalyptic number.

222120121320 is a gapful number since it is divisible by the number (20) 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 222120121320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377783073360).

222120121320 is an abundant number, since it is smaller than the sum of its proper divisors (533446025400).

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

222120121320 is a wasteful number, since it uses less digits than its factorization.

222120121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826077 (or 826064 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 222120121320 its reverse (23121021222), we get a palindrome (245241142542).

The spelling of 222120121320 in words is "two hundred twenty-two billion, one hundred twenty million, one hundred twenty-one thousand, three hundred twenty".