222220121200 has 720 divisors, whose sum is σ = 721266264576. Its totient is φ = 63795916800.

The previous prime is 222220121173. The next prime is 222220121239. The reversal of 222220121200 is 2121022222.

It is a super-2 number, since 2×222220121200² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 595764214 + ... + 595764586.

Almost surely, 2^222220121200 is an apocalyptic number.

222220121200 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 222220121200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360633132288).

222220121200 is an abundant number, since it is smaller than the sum of its proper divisors (499046143376).

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

222220121200 is a wasteful number, since it uses less digits than its factorization.

222220121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 222220121200 its reverse (2121022222), we get a palindrome (224341143422).

The spelling of 222220121200 in words is "two hundred twenty-two billion, two hundred twenty million, one hundred twenty-one thousand, two hundred".