21343140131 has 4 divisors (see below), whose sum is σ = 21344892000. Its totient is φ = 21341388264.

The previous prime is 21343140109. The next prime is 21343140157. The reversal of 21343140131 is 13104134312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21343140131 is a prime.

It is a super-2 number, since 2×21343140131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21343140097 and 21343140106.

It is not an unprimeable number, because it can be changed into a prime (21343140101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857531 + ... + 882068.

It is an arithmetic number, because the mean of its divisors is an integer number (5336223000).

Almost surely, 2^21343140131 is an apocalyptic number.

21343140131 is a deficient number, since it is larger than the sum of its proper divisors (1751869).

21343140131 is a wasteful number, since it uses less digits than its factorization.

21343140131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751868.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21343140131 its reverse (13104134312), we get a palindrome (34447274443).

The spelling of 21343140131 in words is "twenty-one billion, three hundred forty-three million, one hundred forty thousand, one hundred thirty-one".