20031301121 has 6 divisors (see below), whose sum is σ = 21690699030. Its totient is φ = 18490431648.

The previous prime is 20031301117. The next prime is 20031301183. The reversal of 20031301121 is 12110313002.

It can be written as a sum of positive squares in 3 ways, for example, as 926532721 + 19104768400 = 30439^2 + 138220^2 .

It is not a de Polignac number, because 20031301121 - 2² = 20031301117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20031301096 and 20031301105.

It is not an unprimeable number, because it can be changed into a prime (20031301421) 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, 59264036 + ... + 59264373.

It is an arithmetic number, because the mean of its divisors is an integer number (3615116505).

Almost surely, 2^20031301121 is an apocalyptic number.

It is an amenable number.

20031301121 is a deficient number, since it is larger than the sum of its proper divisors (1659397909).

20031301121 is a wasteful number, since it uses less digits than its factorization.

20031301121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118528435 (or 118528422 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20031301121 its reverse (12110313002), we get a palindrome (32141614123).

The spelling of 20031301121 in words is "twenty billion, thirty-one million, three hundred one thousand, one hundred twenty-one".