20431121241 has 16 divisors (see below), whose sum is σ = 27633374208. Its totient is φ = 13424922000.

The previous prime is 20431121239. The next prime is 20431121273. The reversal of 20431121241 is 14212113402.

It is not a de Polignac number, because 20431121241 - 2¹ = 20431121239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20431121201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 819916 + ... + 844466.

It is an arithmetic number, because the mean of its divisors is an integer number (1727085888).

Almost surely, 2^20431121241 is an apocalyptic number.

It is an amenable number.

20431121241 is a deficient number, since it is larger than the sum of its proper divisors (7202252967).

20431121241 is a wasteful number, since it uses less digits than its factorization.

20431121241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28532.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20431121241 its reverse (14212113402), we get a palindrome (34643234643).

The spelling of 20431121241 in words is "twenty billion, four hundred thirty-one million, one hundred twenty-one thousand, two hundred forty-one".