221412331212 has 24 divisors (see below), whose sum is σ = 516976244736. Its totient is φ = 73754471568.

The previous prime is 221412331171. The next prime is 221412331253. The reversal of 221412331212 is 212133214122.

It is an interprime number because it is at equal distance from previous prime (221412331171) and next prime (221412331253).

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, 6186268 + ... + 6221955.

It is an arithmetic number, because the mean of its divisors is an integer number (21540676864).

Almost surely, 2^221412331212 is an apocalyptic number.

It is an amenable number.

221412331212 is an abundant number, since it is smaller than the sum of its proper divisors (295563913524).

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

221412331212 is a wasteful number, since it uses less digits than its factorization.

221412331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12409717 (or 12409715 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 221412331212 its reverse (212133214122), we get a palindrome (433545545334).

The spelling of 221412331212 in words is "two hundred twenty-one billion, four hundred twelve million, three hundred thirty-one thousand, two hundred twelve".