221212322130000 has 100 divisors (see below), whose sum is σ = 714102870908768. Its totient is φ = 58989952560000.

The previous prime is 221212322129989. The next prime is 221212322130001. The reversal of 221212322130000 is 31223212122.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212322130001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3686842036 + ... + 3686902035.

Almost surely, 2^{221212322130000} is an apocalyptic number.

221212322130000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221212322130000 is an abundant number, since it is smaller than the sum of its proper divisors (492890548778768).

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

221212322130000 is an equidigital number, since it uses as much as digits as its factorization.

221212322130000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7373744102 (or 7373744081 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221212322130000 its reverse (31223212122), we get a palindrome (221243545342122).

The spelling of 221212322130000 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred twenty-two million, one hundred thirty thousand".