13020020121 has 32 divisors (see below), whose sum is σ = 17887070592. Its totient is φ = 8420572160.

The previous prime is 13020020093. The next prime is 13020020183. The reversal of 13020020121 is 12102002031.

It is not a de Polignac number, because 13020020121 - 2¹⁹ = 13019495833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13020020097 and 13020020106.

It is not an unprimeable number, because it can be changed into a prime (13020020521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12270931 + ... + 12271991.

It is an arithmetic number, because the mean of its divisors is an integer number (558970956).

Almost surely, 2^13020020121 is an apocalyptic number.

It is an amenable number.

13020020121 is a deficient number, since it is larger than the sum of its proper divisors (4867050471).

13020020121 is a wasteful number, since it uses less digits than its factorization.

13020020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 13020020121 its reverse (12102002031), we get a palindrome (25122022152).

The spelling of 13020020121 in words is "thirteen billion, twenty million, twenty thousand, one hundred twenty-one".