11101210123 has 4 divisors (see below), whose sum is σ = 11685484360. Its totient is φ = 10516935888.

The previous prime is 11101210097. The next prime is 11101210139. The reversal of 11101210123 is 32101210111.

It is a happy number.

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 11101210123 - 2⁹ = 11101209611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11101210163) 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, 292137090 + ... + 292137127.

It is an arithmetic number, because the mean of its divisors is an integer number (2921371090).

Almost surely, 2^11101210123 is an apocalyptic number.

11101210123 is a deficient number, since it is larger than the sum of its proper divisors (584274237).

11101210123 is an equidigital number, since it uses as much as digits as its factorization.

11101210123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584274236.

The product of its (nonzero) digits is 12, while the sum is 13.

Subtracting from 11101210123 its product of nonzero digits (12), we obtain a palindrome (11101210111).

Adding to 11101210123 its reverse (32101210111), we get a palindrome (43202420234).

The spelling of 11101210123 in words is "eleven billion, one hundred one million, two hundred ten thousand, one hundred twenty-three".