221222010012 has 24 divisors (see below), whose sum is σ = 516321388800. Its totient is φ = 73721141616.

The previous prime is 221222009909. The next prime is 221222010059. The reversal of 221222010012 is 210010222122.

It is a junction number, because it is equal to n+sod(n) for n = 221222009973 and 221222010000.

It is a congruent number.

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, 2393812 + ... + 2484507.

It is an arithmetic number, because the mean of its divisors is an integer number (21513391200).

Almost surely, 2^221222010012 is an apocalyptic number.

It is an amenable number.

221222010012 is an abundant number, since it is smaller than the sum of its proper divisors (295099378788).

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

221222010012 is a wasteful number, since it uses less digits than its factorization.

221222010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4882105 (or 4882103 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221222010012 its reverse (210010222122), we get a palindrome (431232232134).

The spelling of 221222010012 in words is "two hundred twenty-one billion, two hundred twenty-two million, ten thousand, twelve".