213221222012 has 12 divisors (see below), whose sum is σ = 374524267320. Its totient is φ = 106214288496.

The previous prime is 213221221987. The next prime is 213221222041. The reversal of 213221222012 is 210222122312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99079418 + ... + 99081569.

It is an arithmetic number, because the mean of its divisors is an integer number (31210355610).

Almost surely, 2^213221222012 is an apocalyptic number.

It is an amenable number.

213221222012 is a deficient number, since it is larger than the sum of its proper divisors (161303045308).

213221222012 is a wasteful number, since it uses less digits than its factorization.

213221222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198161260 (or 198161258 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 213221222012 its reverse (210222122312), we get a palindrome (423443344324).

The spelling of 213221222012 in words is "two hundred thirteen billion, two hundred twenty-one million, two hundred twenty-two thousand, twelve".