10013232121 has 4 divisors (see below), whose sum is σ = 10054781044. Its totient is φ = 9971683200.

The previous prime is 10013232107. The next prime is 10013232149. The reversal of 10013232121 is 12123231001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5682144400 + 4331087721 = 75380^2 + 65811^2 .

It is a cyclic number.

It is not a de Polignac number, because 10013232121 - 2⁹ = 10013231609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10013232095 and 10013232104.

It is not an unprimeable number, because it can be changed into a prime (10013232181) 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, 20774100 + ... + 20774581.

It is an arithmetic number, because the mean of its divisors is an integer number (2513695261).

Almost surely, 2^10013232121 is an apocalyptic number.

It is an amenable number.

10013232121 is a deficient number, since it is larger than the sum of its proper divisors (41548923).

10013232121 is an equidigital number, since it uses as much as digits as its factorization.

10013232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41548922.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 10013232121 its reverse (12123231001), we get a palindrome (22136463122).

The spelling of 10013232121 in words is "ten billion, thirteen million, two hundred thirty-two thousand, one hundred twenty-one".