4002121312 has 24 divisors (see below), whose sum is σ = 9004773456. Its totient is φ = 1715194752.

The previous prime is 4002121303. The next prime is 4002121337. The reversal of 4002121312 is 2131212004.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8933083 + ... + 8933530.

It is an arithmetic number, because the mean of its divisors is an integer number (375198894).

Almost surely, 2^4002121312 is an apocalyptic number.

It is an amenable number.

4002121312 is an abundant number, since it is smaller than the sum of its proper divisors (5002652144).

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

4002121312 is a wasteful number, since it uses less digits than its factorization.

4002121312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17866630 (or 17866622 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 4002121312 is about 63262.3214243676. The cubic root of 4002121312 is about 1587.6816167853.

Adding to 4002121312 its reverse (2131212004), we get a palindrome (6133333316).

The spelling of 4002121312 in words is "four billion, two million, one hundred twenty-one thousand, three hundred twelve".