321221110012 has 48 divisors (see below), whose sum is σ = 615080269440. Its totient is φ = 145572062400.

The previous prime is 321221110003. The next prime is 321221110013. The reversal of 321221110012 is 210011122123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321221110013) 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, 26521414 + ... + 26533522.

It is an arithmetic number, because the mean of its divisors is an integer number (12814172280).

Almost surely, 2^321221110012 is an apocalyptic number.

It is an amenable number.

321221110012 is a deficient number, since it is larger than the sum of its proper divisors (293859159428).

321221110012 is a wasteful number, since it uses less digits than its factorization.

321221110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13882 (or 13880 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 321221110012 its reverse (210011122123), we get a palindrome (531232232135).

It can be divided in two parts, 3212211 and 10012, that added together give a palindrome (3222223).

The spelling of 321221110012 in words is "three hundred twenty-one billion, two hundred twenty-one million, one hundred ten thousand, twelve".