20121320241 has 96 divisors (see below), whose sum is σ = 36017654400. Its totient is φ = 11080903680.

The previous prime is 20121320239. The next prime is 20121320273. The reversal of 20121320241 is 14202312102.

It is a happy number.

It is not a de Polignac number, because 20121320241 - 2¹ = 20121320239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121320201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1310155 + ... + 1325423.

It is an arithmetic number, because the mean of its divisors is an integer number (375183900).

Almost surely, 2^20121320241 is an apocalyptic number.

It is an amenable number.

20121320241 is a deficient number, since it is larger than the sum of its proper divisors (15896334159).

20121320241 is a wasteful number, since it uses less digits than its factorization.

20121320241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15341 (or 15329 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20121320241 its reverse (14202312102), we get a palindrome (34323632343).

The spelling of 20121320241 in words is "twenty billion, one hundred twenty-one million, three hundred twenty thousand, two hundred forty-one".