4002133421 has 16 divisors (see below), whose sum is σ = 4978387008. Its totient is φ = 3160876800.

The previous prime is 4002133411. The next prime is 4002133433. The reversal of 4002133421 is 1243312004.

It is a cyclic number.

It is not a de Polignac number, because 4002133421 - 2¹⁸ = 4001871277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4002133393 and 4002133402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002133411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 820715 + ... + 825576.

It is an arithmetic number, because the mean of its divisors is an integer number (311149188).

Almost surely, 2^4002133421 is an apocalyptic number.

It is an amenable number.

4002133421 is a deficient number, since it is larger than the sum of its proper divisors (976253587).

4002133421 is a wasteful number, since it uses less digits than its factorization.

4002133421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646332.

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

The square root of 4002133421 is about 63262.4171289716. The cubic root of 4002133421 is about 1587.6832180375.

Adding to 4002133421 its reverse (1243312004), we get a palindrome (5245445425).

The spelling of 4002133421 in words is "four billion, two million, one hundred thirty-three thousand, four hundred twenty-one".