4021231340 has 96 divisors (see below), whose sum is σ = 10548486144. Its totient is φ = 1255726080.

The previous prime is 4021231273. The next prime is 4021231349. The reversal of 4021231340 is 431321204.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (4021231349) 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, 46529 + ... + 101031.

It is an arithmetic number, because the mean of its divisors is an integer number (109880064).

Almost surely, 2^4021231340 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 4021231340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5274243072).

4021231340 is an abundant number, since it is smaller than the sum of its proper divisors (6527254804).

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

4021231340 is a wasteful number, since it uses less digits than its factorization.

4021231340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54567 (or 54565 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 4021231340 is about 63413.1795449495. The cubic root of 4021231340 is about 1590.2046517428.

Adding to 4021231340 its reverse (431321204), we get a palindrome (4452552544).

The spelling of 4021231340 in words is "four billion, twenty-one million, two hundred thirty-one thousand, three hundred forty".