4002111421 has 24 divisors (see below), whose sum is σ = 5032166720. Its totient is φ = 3115601280.

The previous prime is 4002111419. The next prime is 4002111467. The reversal of 4002111421 is 1241112004.

It is a happy number.

It is not a de Polignac number, because 4002111421 - 2¹ = 4002111419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4002111395 and 4002111404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002111121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1503790 + ... + 1506448.

Almost surely, 2^4002111421 is an apocalyptic number.

It is an amenable number.

4002111421 is a deficient number, since it is larger than the sum of its proper divisors (1030055299).

4002111421 is a wasteful number, since it uses less digits than its factorization.

4002111421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4465 (or 4454 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 4002111421 is about 63262.2432498248. The cubic root of 4002111421 is about 1587.6803088313.

Adding to 4002111421 its reverse (1241112004), we get a palindrome (5243223425).

The spelling of 4002111421 in words is "four billion, two million, one hundred eleven thousand, four hundred twenty-one".