4002230001221 has 4 divisors (see below), whose sum is σ = 4039634020032. Its totient is φ = 3964825982412.

The previous prime is 4002230001181. The next prime is 4002230001223. The reversal of 4002230001221 is 1221000322004.

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 not a de Polignac number, because 4002230001221 - 2¹⁸ = 4002229739077 is a prime.

It is a super-2 number, since 2×4002230001221² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4002230001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002230001223) 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, 18702009245 + ... + 18702009458.

It is an arithmetic number, because the mean of its divisors is an integer number (1009908505008).

Almost surely, 2^{4002230001221} is an apocalyptic number.

It is an amenable number.

4002230001221 is a deficient number, since it is larger than the sum of its proper divisors (37404018811).

4002230001221 is a wasteful number, since it uses less digits than its factorization.

4002230001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37404018810.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 4002230001221 its reverse (1221000322004), we get a palindrome (5223230323225).

The spelling of 4002230001221 in words is "four trillion, two billion, two hundred thirty million, one thousand, two hundred twenty-one".