13010121 has 6 divisors (see below), whose sum is σ = 18792410. Its totient is φ = 8673408.

The previous prime is 13010059. The next prime is 13010143. The reversal of 13010121 is 12101031.

It can be written as a sum of positive squares in only one way, i.e., 12702096 + 308025 = 3564^2 + 555^2 .

It is not a de Polignac number, because 13010121 - 2⁹ = 13009609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1445569 = 13010121 / (1 + 3 + 0 + 1 + 0 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13010191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 722776 + ... + 722793.

Almost surely, 2^13010121 is an apocalyptic number.

It is an amenable number.

13010121 is a deficient number, since it is larger than the sum of its proper divisors (5782289).

13010121 is a wasteful number, since it uses less digits than its factorization.

13010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445575 (or 1445572 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 13010121 is about 3606.9545325662. The cubic root of 13010121 is about 235.1944730931.

Adding to 13010121 its reverse (12101031), we get a palindrome (25111152).

It can be divided in two parts, 13010 and 121, that added together give a palindrome (13131).

The spelling of 13010121 in words is "thirteen million, ten thousand, one hundred twenty-one".