21341043111 has 4 divisors (see below), whose sum is σ = 28454724152. Its totient is φ = 14227362072.

The previous prime is 21341043103. The next prime is 21341043121. The reversal of 21341043111 is 11134014312.

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

It is not a de Polignac number, because 21341043111 - 2³ = 21341043103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341043121) 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, 3556840516 + ... + 3556840521.

It is an arithmetic number, because the mean of its divisors is an integer number (7113681038).

Almost surely, 2^21341043111 is an apocalyptic number.

21341043111 is a deficient number, since it is larger than the sum of its proper divisors (7113681041).

21341043111 is an equidigital number, since it uses as much as digits as its factorization.

21341043111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7113681040.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21341043111 its reverse (11134014312), we get a palindrome (32475057423).

The spelling of 21341043111 in words is "twenty-one billion, three hundred forty-one million, forty-three thousand, one hundred eleven".