11121020123 has 4 divisors (see below), whose sum is σ = 11127733320. Its totient is φ = 11114306928.

The previous prime is 11121020089. The next prime is 11121020143. The reversal of 11121020123 is 32102012111.

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 11121020123 - 2⁶ = 11121020059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121020098 and 11121020107.

It is not an unprimeable number, because it can be changed into a prime (11121020143) 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, 3354113 + ... + 3357426.

It is an arithmetic number, because the mean of its divisors is an integer number (2781933330).

Almost surely, 2^11121020123 is an apocalyptic number.

11121020123 is a deficient number, since it is larger than the sum of its proper divisors (6713197).

11121020123 is an equidigital number, since it uses as much as digits as its factorization.

11121020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6713196.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11121020123 its reverse (32102012111), we get a palindrome (43223032234).

The spelling of 11121020123 in words is "eleven billion, one hundred twenty-one million, twenty thousand, one hundred twenty-three".