222012121200 has 240 divisors, whose sum is σ = 734099443200. Its totient is φ = 57311400960.

The previous prime is 222012121171. The next prime is 222012121211. The reversal of 222012121200 is 2121210222.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 222012121200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8823037 + ... + 8848163.

It is an arithmetic number, because the mean of its divisors is an integer number (3058747680).

Almost surely, 2^222012121200 is an apocalyptic number.

222012121200 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 222012121200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367049721600).

222012121200 is an abundant number, since it is smaller than the sum of its proper divisors (512087322000).

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

222012121200 is a wasteful number, since it uses less digits than its factorization.

222012121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25384 (or 25373 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 222012121200 its reverse (2121210222), we get a palindrome (224133331422).

The spelling of 222012121200 in words is "two hundred twenty-two billion, twelve million, one hundred twenty-one thousand, two hundred".