10212113221 has 8 divisors (see below), whose sum is σ = 10243008504. Its totient is φ = 10181250240.

The previous prime is 10212113213. The next prime is 10212113243. The reversal of 10212113221 is 12231121201.

It can be written as a sum of positive squares in 4 ways, for example, as 196 + 10212113025 = 14^2 + 101055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10212113221 - 2³ = 10212113213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10212113195 and 10212113204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212113201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722595 + ... + 736591.

It is an arithmetic number, because the mean of its divisors is an integer number (1280376063).

Almost surely, 2^10212113221 is an apocalyptic number.

It is an amenable number.

10212113221 is a deficient number, since it is larger than the sum of its proper divisors (30895283).

10212113221 is a wasteful number, since it uses less digits than its factorization.

10212113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16151.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 10212113221 its reverse (12231121201), we get a palindrome (22443234422).

The spelling of 10212113221 in words is "ten billion, two hundred twelve million, one hundred thirteen thousand, two hundred twenty-one".