21141321113 has 4 divisors (see below), whose sum is σ = 23063259408. Its totient is φ = 19219382820.

The previous prime is 21141321077. The next prime is 21141321127. The reversal of 21141321113 is 31112314112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21141321113 - 2⁶ = 21141321049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21141341113) 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, 960969131 + ... + 960969152.

It is an arithmetic number, because the mean of its divisors is an integer number (5765814852).

Almost surely, 2^21141321113 is an apocalyptic number.

It is an amenable number.

21141321113 is a deficient number, since it is larger than the sum of its proper divisors (1921938295).

21141321113 is a wasteful number, since it uses less digits than its factorization.

21141321113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921938294.

The product of its digits is 144, while the sum is 20.

Adding to 21141321113 its reverse (31112314112), we get a palindrome (52253635225).

The spelling of 21141321113 in words is "twenty-one billion, one hundred forty-one million, three hundred twenty-one thousand, one hundred thirteen".