221242413212 has 6 divisors (see below), whose sum is σ = 387174223128. Its totient is φ = 110621206604.

The previous prime is 221242413187. The next prime is 221242413253. The reversal of 221242413212 is 212314242122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27655301648 + ... + 27655301655.

It is an arithmetic number, because the mean of its divisors is an integer number (64529037188).

Almost surely, 2^221242413212 is an apocalyptic number.

It is an amenable number.

221242413212 is a deficient number, since it is larger than the sum of its proper divisors (165931809916).

221242413212 is a wasteful number, since it uses less digits than its factorization.

221242413212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55310603307 (or 55310603305 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

Adding to 221242413212 its reverse (212314242122), we get a palindrome (433556655334).

The spelling of 221242413212 in words is "two hundred twenty-one billion, two hundred forty-two million, four hundred thirteen thousand, two hundred twelve".