221212012411 has 6 divisors (see below), whose sum is σ = 239537268060. Its totient is φ = 204195703608.

The previous prime is 221212012403. The next prime is 221212012429. The reversal of 221212012411 is 114210212122.

It is not a de Polignac number, because 221212012411 - 2³ = 221212012403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221212012211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 654473241 + ... + 654473578.

It is an arithmetic number, because the mean of its divisors is an integer number (39922878010).

Almost surely, 2^221212012411 is an apocalyptic number.

221212012411 is a deficient number, since it is larger than the sum of its proper divisors (18325255649).

221212012411 is a wasteful number, since it uses less digits than its factorization.

221212012411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308946845 (or 1308946832 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221212012411 its reverse (114210212122), we get a palindrome (335422224533).

The spelling of 221212012411 in words is "two hundred twenty-one billion, two hundred twelve million, twelve thousand, four hundred eleven".