13140343122021 has 12 divisors (see below), whose sum is σ = 18984516121740. Its totient is φ = 8758373132160.

The previous prime is 13140343122017. The next prime is 13140343122029. The reversal of 13140343122021 is 12022134304131.

13140343122021 is a `hidden beast` number, since 1 + 3 + 1 + 4 + 0 + 3 + 431 + 220 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9453079071396 + 3687264050625 = 3074586^2 + 1920225^2 .

It is not a de Polignac number, because 13140343122021 - 2² = 13140343122017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140343122029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154589806 + ... + 154674783.

It is an arithmetic number, because the mean of its divisors is an integer number (1582043010145).

Almost surely, 2^{13140343122021} is an apocalyptic number.

It is an amenable number.

13140343122021 is a deficient number, since it is larger than the sum of its proper divisors (5844172999719).

13140343122021 is a wasteful number, since it uses less digits than its factorization.

13140343122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309269316 (or 309269313 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 13140343122021 its reverse (12022134304131), we get a palindrome (25162477426152).

The spelling of 13140343122021 in words is "thirteen trillion, one hundred forty billion, three hundred forty-three million, one hundred twenty-two thousand, twenty-one".