21114431411 has 6 divisors (see below), whose sum is σ = 22072364580. Its totient is φ = 20196412148.

The previous prime is 21114431333. The next prime is 21114431441. The reversal of 21114431411 is 11413441112.

It is a de Polignac number, because none of the positive numbers 2^k-21114431411 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21114431441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19956401 + ... + 19957458.

It is an arithmetic number, because the mean of its divisors is an integer number (3678727430).

Almost surely, 2^21114431411 is an apocalyptic number.

21114431411 is a deficient number, since it is larger than the sum of its proper divisors (957933169).

21114431411 is an equidigital number, since it uses as much as digits as its factorization.

21114431411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39913905 (or 39913882 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

Adding to 21114431411 its reverse (11413441112), we get a palindrome (32527872523).

The spelling of 21114431411 in words is "twenty-one billion, one hundred fourteen million, four hundred thirty-one thousand, four hundred eleven".