4021231312 has 40 divisors (see below), whose sum is σ = 9291298176. Its totient is φ = 1648454016.

The previous prime is 4021231273. The next prime is 4021231349. The reversal of 4021231312 is 2131321204.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 4021231312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 777943 + ... + 783094.

Almost surely, 2^4021231312 is an apocalyptic number.

It is an amenable number.

4021231312 is an abundant number, since it is smaller than the sum of its proper divisors (5270066864).

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

4021231312 is a wasteful number, since it uses less digits than its factorization.

4021231312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561075 (or 1561069 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 4021231312 is about 63413.1793241752. The cubic root of 4021231312 is about 1590.2046480519.

Adding to 4021231312 its reverse (2131321204), we get a palindrome (6152552516).

The spelling of 4021231312 in words is "four billion, twenty-one million, two hundred thirty-one thousand, three hundred twelve".