221301232212 has 48 divisors (see below), whose sum is σ = 529203229632. Its totient is φ = 71939051520.

The previous prime is 221301232153. The next prime is 221301232219. The reversal of 221301232212 is 212232103122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221301232219) 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 15 ways as a sum of consecutive naturals, for example, 3783 + ... + 665294.

It is an arithmetic number, because the mean of its divisors is an integer number (11025067284).

Almost surely, 2^221301232212 is an apocalyptic number.

It is an amenable number.

221301232212 is an abundant number, since it is smaller than the sum of its proper divisors (307901997420).

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

221301232212 is a wasteful number, since it uses less digits than its factorization.

221301232212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669768 (or 669766 counting only the distinct ones).

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

Adding to 221301232212 its reverse (212232103122), we get a palindrome (433533335334).

The spelling of 221301232212 in words is "two hundred twenty-one billion, three hundred one million, two hundred thirty-two thousand, two hundred twelve".