321020112 has 160 divisors (see below), whose sum is σ = 1027648512. Its totient is φ = 84252672.

The previous prime is 321020101. The next prime is 321020137. The reversal of 321020112 is 211020123.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244963 + ... + 246269.

Almost surely, 2^321020112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321020112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (513824256).

321020112 is an abundant number, since it is smaller than the sum of its proper divisors (706628400).

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

321020112 is a wasteful number, since it uses less digits than its factorization.

321020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1379 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 321020112 is about 17917.0341295651. The cubic root of 321020112 is about 684.7164272812.

Adding to 321020112 its reverse (211020123), we get a palindrome (532040235).

The spelling of 321020112 in words is "three hundred twenty-one million, twenty thousand, one hundred twelve".