222212121000000 has 392 divisors, whose sum is σ = 754773722522688. Its totient is φ = 57655008000000.

The previous prime is 222212120999993. The next prime is 222212121000011. The reversal of 222212121000000 is 121212222.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 109999045 + ... + 112000955.

Almost surely, 2^{222212121000000} is an apocalyptic number.

222212121000000 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 222212121000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377386861261344).

222212121000000 is an abundant number, since it is smaller than the sum of its proper divisors (532561601522688).

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

222212121000000 is an frugal number, since it uses more digits than its factorization.

222212121000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001993 (or 2001958 counting only the distinct ones).

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

Adding to 222212121000000 its reverse (121212222), we get a palindrome (222212242212222).

The spelling of 222212121000000 in words is "two hundred twenty-two trillion, two hundred twelve billion, one hundred twenty-one million", and thus it is an aban number.