221222321412 has 24 divisors (see below), whose sum is σ = 517472673312. Its totient is φ = 73556880000.

The previous prime is 221222321357. The next prime is 221222321473. The reversal of 221222321412 is 214123222122.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22981714 + ... + 22991337.

It is an arithmetic number, because the mean of its divisors is an integer number (21561361388).

Almost surely, 2^221222321412 is an apocalyptic number.

It is an amenable number.

221222321412 is an abundant number, since it is smaller than the sum of its proper divisors (296250351900).

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

221222321412 is a wasteful number, since it uses less digits than its factorization.

221222321412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45973459 (or 45973457 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

Adding to 221222321412 its reverse (214123222122), we get a palindrome (435345543534).

The spelling of 221222321412 in words is "two hundred twenty-one billion, two hundred twenty-two million, three hundred twenty-one thousand, four hundred twelve".