20032121121 has 32 divisors (see below), whose sum is σ = 27704291328. Its totient is φ = 12866810880.

The previous prime is 20032121111. The next prime is 20032121159. The reversal of 20032121121 is 12112123002.

It is not a de Polignac number, because 20032121121 - 2¹³ = 20032112929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20032121121.

It is not an unprimeable number, because it can be changed into a prime (20032121111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9479361 + ... + 9481473.

It is an arithmetic number, because the mean of its divisors is an integer number (865759104).

Almost surely, 2^20032121121 is an apocalyptic number.

It is an amenable number.

20032121121 is a deficient number, since it is larger than the sum of its proper divisors (7672170207).

20032121121 is a wasteful number, since it uses less digits than its factorization.

20032121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3181.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20032121121 its reverse (12112123002), we get a palindrome (32144244123).

The spelling of 20032121121 in words is "twenty billion, thirty-two million, one hundred twenty-one thousand, one hundred twenty-one".