21114240143 has 32 divisors (see below), whose sum is σ = 24223449600. Its totient is φ = 18299799936.

The previous prime is 21114240127. The next prime is 21114240149. The reversal of 21114240143 is 34104241112.

It is a cyclic number.

It is not a de Polignac number, because 21114240143 - 2⁴ = 21114240127 is a prime.

It is a super-2 number, since 2×21114240143² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114240149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 942905 + ... + 965037.

It is an arithmetic number, because the mean of its divisors is an integer number (756982800).

Almost surely, 2^21114240143 is an apocalyptic number.

21114240143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21114240143 is a deficient number, since it is larger than the sum of its proper divisors (3109209457).

21114240143 is a wasteful number, since it uses less digits than its factorization.

21114240143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22271.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21114240143 its reverse (34104241112), we get a palindrome (55218481255).

The spelling of 21114240143 in words is "twenty-one billion, one hundred fourteen million, two hundred forty thousand, one hundred forty-three".