221220210012 has 48 divisors (see below), whose sum is σ = 543399575040. Its totient is φ = 69852367872.

The previous prime is 221220210011. The next prime is 221220210059. The reversal of 221220210012 is 210012022122.

It is a junction number, because it is equal to n+sod(n) for n = 221220209973 and 221220210000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220210011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2718013 + ... + 2798219.

It is an arithmetic number, because the mean of its divisors is an integer number (11320824480).

Almost surely, 2^221220210012 is an apocalyptic number.

It is an amenable number.

221220210012 is an abundant number, since it is smaller than the sum of its proper divisors (322179365028).

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

221220210012 is a wasteful number, since it uses less digits than its factorization.

221220210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92330 (or 92328 counting only the distinct ones).

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

Adding to 221220210012 its reverse (210012022122), we get a palindrome (431232232134).

The spelling of 221220210012 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred ten thousand, twelve".