4001221323 has 24 divisors (see below), whose sum is σ = 6391335600. Its totient is φ = 2391759360.

The previous prime is 4001221319. The next prime is 4001221351. The reversal of 4001221323 is 3231221004.

It is not a de Polignac number, because 4001221323 - 2² = 4001221319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4001221296 and 4001221305.

It is not an unprimeable number, because it can be changed into a prime (4001221123) 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, 269598 + ... + 284051.

It is an arithmetic number, because the mean of its divisors is an integer number (266305650).

Almost surely, 2^4001221323 is an apocalyptic number.

4001221323 is a deficient number, since it is larger than the sum of its proper divisors (2390114277).

4001221323 is a wasteful number, since it uses less digits than its factorization.

4001221323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553739 (or 553736 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 4001221323 is about 63255.2078725539. The cubic root of 4001221323 is about 1587.5625963124.

Adding to 4001221323 its reverse (3231221004), we get a palindrome (7232442327).

The spelling of 4001221323 in words is "four billion, one million, two hundred twenty-one thousand, three hundred twenty-three".