10011312221 has 4 divisors (see below), whose sum is σ = 10224318912. Its totient is φ = 9798305532.

The previous prime is 10011312151. The next prime is 10011312247. The reversal of 10011312221 is 12221311001.

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-10011312221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10011312196 and 10011312205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011312721) 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, 106503275 + ... + 106503368.

It is an arithmetic number, because the mean of its divisors is an integer number (2556079728).

Almost surely, 2^10011312221 is an apocalyptic number.

It is an amenable number.

10011312221 is a deficient number, since it is larger than the sum of its proper divisors (213006691).

10011312221 is an equidigital number, since it uses as much as digits as its factorization.

10011312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213006690.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 10011312221 its reverse (12221311001), we get a palindrome (22232623222).

The spelling of 10011312221 in words is "ten billion, eleven million, three hundred twelve thousand, two hundred twenty-one".