10102013221 has 4 divisors (see below), whose sum is σ = 10115795692. Its totient is φ = 10088230752.

The previous prime is 10102013167. The next prime is 10102013227. The reversal of 10102013221 is 12231020101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12231020101 = 547 ⋅22360183.

It can be written as a sum of positive squares in 2 ways, for example, as 6333772225 + 3768240996 = 79585^2 + 61386^2 .

It is a cyclic number.

It is not a de Polignac number, because 10102013221 - 2⁹ = 10102012709 is a prime.

It is a super-2 number, since 2×10102013221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10102013227) 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, 6890136 + ... + 6891601.

It is an arithmetic number, because the mean of its divisors is an integer number (2528948923).

Almost surely, 2^10102013221 is an apocalyptic number.

It is an amenable number.

10102013221 is a deficient number, since it is larger than the sum of its proper divisors (13782471).

10102013221 is an equidigital number, since it uses as much as digits as its factorization.

10102013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13782470.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 10102013221 its reverse (12231020101), we get a palindrome (22333033322).

The spelling of 10102013221 in words is "ten billion, one hundred two million, thirteen thousand, two hundred twenty-one".