111021203123 has 16 divisors (see below), whose sum is σ = 120892861440. Its totient is φ = 101566936800.

The previous prime is 111021203089. The next prime is 111021203197. The reversal of 111021203123 is 321302120111.

It is not a de Polignac number, because 111021203123 - 2⁸ = 111021202867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111021203723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73253 + ... + 476873.

It is an arithmetic number, because the mean of its divisors is an integer number (7555803840).

Almost surely, 2^111021203123 is an apocalyptic number.

111021203123 is a deficient number, since it is larger than the sum of its proper divisors (9871658317).

111021203123 is a wasteful number, since it uses less digits than its factorization.

111021203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404138.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 111021203123 its reverse (321302120111), we get a palindrome (432323323234).

The spelling of 111021203123 in words is "one hundred eleven billion, twenty-one million, two hundred three thousand, one hundred twenty-three".