21404143111 has 8 divisors (see below), whose sum is σ = 23612826384. Its totient is φ = 19275775680.

The previous prime is 21404143081. The next prime is 21404143139. The reversal of 21404143111 is 11134140412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21404143111 - 2⁷ = 21404142983 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 (21404143151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20078401 + ... + 20079466.

It is an arithmetic number, because the mean of its divisors is an integer number (2951603298).

Almost surely, 2^21404143111 is an apocalyptic number.

21404143111 is a deficient number, since it is larger than the sum of its proper divisors (2208683273).

21404143111 is a wasteful number, since it uses less digits than its factorization.

21404143111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40157921.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 21404143111 its reverse (11134140412), we get a palindrome (32538283523).

The spelling of 21404143111 in words is "twenty-one billion, four hundred four million, one hundred forty-three thousand, one hundred eleven".