12213221012 has 12 divisors (see below), whose sum is σ = 21374900736. Its totient is φ = 6106106520.

The previous prime is 12213220963. The next prime is 12213221017. The reversal of 12213221012 is 21012231221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213221017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68564 + ... + 170667.

It is an arithmetic number, because the mean of its divisors is an integer number (1781241728).

Almost surely, 2^12213221012 is an apocalyptic number.

It is an amenable number.

12213221012 is a deficient number, since it is larger than the sum of its proper divisors (9161679724).

12213221012 is a wasteful number, since it uses less digits than its factorization.

12213221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251998 (or 251996 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12213221012 its reverse (21012231221), we get a palindrome (33225452233).

The spelling of 12213221012 in words is "twelve billion, two hundred thirteen million, two hundred twenty-one thousand, twelve".