221212303442300 has 36 divisors (see below), whose sum is σ = 480123387506280. Its totient is φ = 88467835840320.

The previous prime is 221212303442203. The next prime is 221212303442303. The reversal of 221212303442300 is 3244303212122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212303442303) 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 11 ways as a sum of consecutive naturals, for example, 213048719 + ... + 214084518.

Almost surely, 2^{221212303442300} is an apocalyptic number.

221212303442300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221212303442300 is an abundant number, since it is smaller than the sum of its proper divisors (258911084063980).

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

221212303442300 is a wasteful number, since it uses less digits than its factorization.

221212303442300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427138430 (or 427138423 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 221212303442300 its reverse (3244303212122), we get a palindrome (224456606654422).

The spelling of 221212303442300 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred three million, four hundred forty-two thousand, three hundred".