11111231104 has 16 divisors (see below), whose sum is σ = 22135655970. Its totient is φ = 5555615488.

The previous prime is 11111231083. The next prime is 11111231107. The reversal of 11111231104 is 40113211111.

It can be written as a sum of positive squares in only one way, i.e., 5558000704 + 5553230400 = 74552^2 + 74520^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (11111231107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43403119 + ... + 43403374.

Almost surely, 2^11111231104 is an apocalyptic number.

It is an amenable number.

11111231104 is a deficient number, since it is larger than the sum of its proper divisors (11024424866).

11111231104 is an frugal number, since it uses more digits than its factorization.

11111231104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86806507 (or 86806495 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 11111231104 its reverse (40113211111), we get a palindrome (51224442215).

The spelling of 11111231104 in words is "eleven billion, one hundred eleven million, two hundred thirty-one thousand, one hundred four".