20130001121 has 4 divisors (see below), whose sum is σ = 21314118852. Its totient is φ = 18945883392.

The previous prime is 20130001103. The next prime is 20130001141. The reversal of 20130001121 is 12110003102.

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 10724880721 + 9405120400 = 103561^2 + 96980^2 .

It is a cyclic number.

It is not a de Polignac number, because 20130001121 - 2²⁶ = 20062892257 is a prime.

It is a super-2 number, since 2×20130001121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20130001141) 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, 592058840 + ... + 592058873.

It is an arithmetic number, because the mean of its divisors is an integer number (5328529713).

Almost surely, 2^20130001121 is an apocalyptic number.

It is an amenable number.

20130001121 is a deficient number, since it is larger than the sum of its proper divisors (1184117731).

20130001121 is a wasteful number, since it uses less digits than its factorization.

20130001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184117730.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20130001121 its reverse (12110003102), we get a palindrome (32240004223).

The spelling of 20130001121 in words is "twenty billion, one hundred thirty million, one thousand, one hundred twenty-one".