321203012112 has 160 divisors (see below), whose sum is σ = 937038240000. Its totient is φ = 105330170880.

The previous prime is 321203012111. The next prime is 321203012149. The reversal of 321203012112 is 211210302123.

321203012112 is a `hidden beast` number, since 32 + 120 + 301 + 211 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (321203012111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7630162 + ... + 7672142.

It is an arithmetic number, because the mean of its divisors is an integer number (5856489000).

Almost surely, 2^321203012112 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 321203012112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (468519120000).

321203012112 is an abundant number, since it is smaller than the sum of its proper divisors (615835227888).

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

321203012112 is a wasteful number, since it uses less digits than its factorization.

321203012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42286 (or 42274 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 321203012112 its reverse (211210302123), we get a palindrome (532413314235).

The spelling of 321203012112 in words is "three hundred twenty-one billion, two hundred three million, twelve thousand, one hundred twelve".