221212011404 has 12 divisors (see below), whose sum is σ = 392898946104. Its totient is φ = 108955169664.

The previous prime is 221212011359. The next prime is 221212011421. The reversal of 221212011404 is 404110212122.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 412708709 + ... + 412709244.

It is an arithmetic number, because the mean of its divisors is an integer number (32741578842).

Almost surely, 2^221212011404 is an apocalyptic number.

It is an amenable number.

221212011404 is a deficient number, since it is larger than the sum of its proper divisors (171686934700).

221212011404 is a wasteful number, since it uses less digits than its factorization.

221212011404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825418024 (or 825418022 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221212011404 its reverse (404110212122), we get a palindrome (625322223526).

The spelling of 221212011404 in words is "two hundred twenty-one billion, two hundred twelve million, eleven thousand, four hundred four".