4004004322421 has 4 divisors (see below), whose sum is σ = 4004050752000. Its totient is φ = 4003957892844.

The previous prime is 4004004322399. The next prime is 4004004322447. The reversal of 4004004322421 is 1242234004004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4004004322421 is a prime.

It is a super-2 number, since 2×4004004322421² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4004004322481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23085191 + ... + 23257988.

It is an arithmetic number, because the mean of its divisors is an integer number (1001012688000).

Almost surely, 2^{4004004322421} is an apocalyptic number.

It is an amenable number.

4004004322421 is a deficient number, since it is larger than the sum of its proper divisors (46429579).

4004004322421 is an equidigital number, since it uses as much as digits as its factorization.

4004004322421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46429578.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 4004004322421 its reverse (1242234004004), we get a palindrome (5246238326425).

The spelling of 4004004322421 in words is "four trillion, four billion, four million, three hundred twenty-two thousand, four hundred twenty-one".