212222221000000 has 392 divisors, whose sum is σ = 532173988085760. Its totient is φ = 83963596800000.

The previous prime is 212222220999973. The next prime is 212222221000033. The reversal of 212222221000000 is 122222212.

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 55 ways as a sum of consecutive naturals, for example, 34546996929 + ... + 34547003071.

Almost surely, 2^{212222221000000} is an apocalyptic number.

212222221000000 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 212222221000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266086994042880).

212222221000000 is an abundant number, since it is smaller than the sum of its proper divisors (319951767085760).

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

212222221000000 is an frugal number, since it uses more digits than its factorization.

212222221000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6557 (or 6522 counting only the distinct ones).

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

Adding to 212222221000000 its reverse (122222212), we get a palindrome (212222343222212).

It can be divided in two parts, 21222222 and 1000000, that added together give a palindrome (22222222).

The spelling of 212222221000000 in words is "two hundred twelve trillion, two hundred twenty-two billion, two hundred twenty-one million", and thus it is an aban number.