320231221212 has 48 divisors (see below), whose sum is σ = 862753552640. Its totient is φ = 90551388672.

The previous prime is 320231221127. The next prime is 320231221217. The reversal of 320231221212 is 212122132023.

320231221212 is digitally balanced in base 4 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320231221217) 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, 19642762 + ... + 19659057.

Almost surely, 2^320231221212 is an apocalyptic number.

It is an amenable number.

320231221212 is an abundant number, since it is smaller than the sum of its proper divisors (542522331428).

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

320231221212 is a wasteful number, since it uses less digits than its factorization.

320231221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39301930 (or 39301928 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 320231221212 its reverse (212122132023), we get a palindrome (532353353235).

The spelling of 320231221212 in words is "three hundred twenty billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred twelve".