23513211111 has 32 divisors (see below), whose sum is σ = 34888419328. Its totient is φ = 13988142720.

The previous prime is 23513211103. The next prime is 23513211133. The reversal of 23513211111 is 11111231532.

It is not a de Polignac number, because 23513211111 - 2³ = 23513211103 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 (23513211101) 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, 1195620 + ... + 1215126.

It is an arithmetic number, because the mean of its divisors is an integer number (1090263104).

Almost surely, 2^23513211111 is an apocalyptic number.

23513211111 is a deficient number, since it is larger than the sum of its proper divisors (11375208217).

23513211111 is a wasteful number, since it uses less digits than its factorization.

23513211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20551.

The product of its digits is 180, while the sum is 21.

Adding to 23513211111 its reverse (11111231532), we get a palindrome (34624442643).

The spelling of 23513211111 in words is "twenty-three billion, five hundred thirteen million, two hundred eleven thousand, one hundred eleven".