10401213221 has 4 divisors (see below), whose sum is σ = 11887100832. Its totient is φ = 8915325612.

The previous prime is 10401213211. The next prime is 10401213247. The reversal of 10401213221 is 12231210401.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12231210401 = 4909 ⋅2491589.

It is a cyclic number.

It is not a de Polignac number, because 10401213221 - 2²⁶ = 10334104357 is a prime.

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 10401213221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10401213211) 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, 742943795 + ... + 742943808.

It is an arithmetic number, because the mean of its divisors is an integer number (2971775208).

Almost surely, 2^10401213221 is an apocalyptic number.

It is an amenable number.

10401213221 is a deficient number, since it is larger than the sum of its proper divisors (1485887611).

10401213221 is an equidigital number, since it uses as much as digits as its factorization.

10401213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485887610.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 10401213221 its reverse (12231210401), we get a palindrome (22632423622).

The spelling of 10401213221 in words is "ten billion, four hundred one million, two hundred thirteen thousand, two hundred twenty-one".