20131121141 has 2 divisors, whose sum is σ = 20131121142. Its totient is φ = 20131121140.

The previous prime is 20131121117. The next prime is 20131121177. The reversal of 20131121141 is 14112113102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10185048241 + 9946072900 = 100921^2 + 99730^2 .

It is a cyclic number.

It is not a de Polignac number, because 20131121141 - 2⁶ = 20131121077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20131121191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065560570 + 10065560571.

It is an arithmetic number, because the mean of its divisors is an integer number (10065560571).

Almost surely, 2^20131121141 is an apocalyptic number.

It is an amenable number.

20131121141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131121141 is an equidigital number, since it uses as much as digits as its factorization.

20131121141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20131121141 its reverse (14112113102), we get a palindrome (34243234243).

The spelling of 20131121141 in words is "twenty billion, one hundred thirty-one million, one hundred twenty-one thousand, one hundred forty-one".