222121200312 has 96 divisors (see below), whose sum is σ = 659893394160. Its totient is φ = 66937536000.

The previous prime is 222121200311. The next prime is 222121200319. The reversal of 222121200312 is 213002121222.

222121200312 is a `hidden beast` number, since 22 + 212 + 120 + 0 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121200311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 631389 + ... + 918092.

Almost surely, 2^222121200312 is an apocalyptic number.

222121200312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

222121200312 is an abundant number, since it is smaller than the sum of its proper divisors (437772193848).

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

222121200312 is a wasteful number, since it uses less digits than its factorization.

222121200312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549685 (or 1549678 counting only the distinct ones).

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

Adding to 222121200312 its reverse (213002121222), we get a palindrome (435123321534).

The spelling of 222121200312 in words is "two hundred twenty-two billion, one hundred twenty-one million, two hundred thousand, three hundred twelve".