21101340131 has 4 divisors (see below), whose sum is σ = 22211937000. Its totient is φ = 19990743264.

The previous prime is 21101340119. The next prime is 21101340173. The reversal of 21101340131 is 13104310112.

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

It is a cyclic number.

It is not a de Polignac number, because 21101340131 - 2³⁰ = 20027598307 is a prime.

It is a super-2 number, since 2×21101340131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101340191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555298406 + ... + 555298443.

It is an arithmetic number, because the mean of its divisors is an integer number (5552984250).

Almost surely, 2^21101340131 is an apocalyptic number.

21101340131 is a deficient number, since it is larger than the sum of its proper divisors (1110596869).

21101340131 is a wasteful number, since it uses less digits than its factorization.

21101340131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110596868.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21101340131 its reverse (13104310112), we get a palindrome (34205650243).

The spelling of 21101340131 in words is "twenty-one billion, one hundred one million, three hundred forty thousand, one hundred thirty-one".