221212323342 has 24 divisors (see below), whose sum is σ = 479329363344. Its totient is φ = 73731903264.

The previous prime is 221212323253. The next prime is 221212323349. The reversal of 221212323342 is 243323212122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212323349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211498 + ... + 697965.

It is an arithmetic number, because the mean of its divisors is an integer number (19972056806).

Almost surely, 2^221212323342 is an apocalyptic number.

221212323342 is an abundant number, since it is smaller than the sum of its proper divisors (258117040002).

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

221212323342 is a wasteful number, since it uses less digits than its factorization.

221212323342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922984 (or 922981 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 221212323342 its reverse (243323212122), we get a palindrome (464535535464).

The spelling of 221212323342 in words is "two hundred twenty-one billion, two hundred twelve million, three hundred twenty-three thousand, three hundred forty-two".