11321020123 has 12 divisors (see below), whose sum is σ = 13392562680. Its totient is φ = 9539259072.

The previous prime is 11321020111. The next prime is 11321020133. The reversal of 11321020123 is 32102012311.

11321020123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11321020123 - 2¹⁷ = 11320889051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11321020097 and 11321020106.

It is not an unprimeable number, because it can be changed into a prime (11321020133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1955086 + ... + 1960867.

It is an arithmetic number, because the mean of its divisors is an integer number (1116046890).

Almost surely, 2^11321020123 is an apocalyptic number.

11321020123 is a deficient number, since it is larger than the sum of its proper divisors (2071542557).

11321020123 is an equidigital number, since it uses as much as digits as its factorization.

11321020123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3916026 (or 3916019 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11321020123 its reverse (32102012311), we get a palindrome (43423032434).

It can be divided in two parts, 11 and 321020123, that multiplied together give a palindrome (3531221353).

The spelling of 11321020123 in words is "eleven billion, three hundred twenty-one million, twenty thousand, one hundred twenty-three".