23402131111 has 4 divisors (see below), whose sum is σ = 23409932224. Its totient is φ = 23394330000.

The previous prime is 23402131091. The next prime is 23402131139. The reversal of 23402131111 is 11113120432.

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 23402131111 - 2¹¹ = 23402129063 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 (23402131141) 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, 3896055 + ... + 3902056.

It is an arithmetic number, because the mean of its divisors is an integer number (5852483056).

Almost surely, 2^23402131111 is an apocalyptic number.

23402131111 is a deficient number, since it is larger than the sum of its proper divisors (7801113).

23402131111 is an equidigital number, since it uses as much as digits as its factorization.

23402131111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7801112.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 23402131111 its reverse (11113120432), we get a palindrome (34515251543).

The spelling of 23402131111 in words is "twenty-three billion, four hundred two million, one hundred thirty-one thousand, one hundred eleven".