21140414411 has 4 divisors (see below), whose sum is σ = 21144121824. Its totient is φ = 21136707000.

The previous prime is 21140414377. The next prime is 21140414437. The reversal of 21140414411 is 11441404112.

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 21140414411 - 2²² = 21136220107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21140414111) 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, 1845140 + ... + 1856561.

It is an arithmetic number, because the mean of its divisors is an integer number (5286030456).

Almost surely, 2^21140414411 is an apocalyptic number.

21140414411 is a deficient number, since it is larger than the sum of its proper divisors (3707413).

21140414411 is an equidigital number, since it uses as much as digits as its factorization.

21140414411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707412.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 21140414411 its reverse (11441404112), we get a palindrome (32581818523).

The spelling of 21140414411 in words is "twenty-one billion, one hundred forty million, four hundred fourteen thousand, four hundred eleven".