111321202123 has 4 divisors (see below), whose sum is σ = 112468843480. Its totient is φ = 110173560768.

The previous prime is 111321202117. The next prime is 111321202159. The reversal of 111321202123 is 321202123111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321202123111 = 2957 ⋅108624323.

It is a cyclic number.

It is not a de Polignac number, because 111321202123 - 2¹³ = 111321193931 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111321202123.

It is not an unprimeable number, because it can be changed into a prime (111321202163) 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, 573820533 + ... + 573820726.

It is an arithmetic number, because the mean of its divisors is an integer number (28117210870).

Almost surely, 2^111321202123 is an apocalyptic number.

111321202123 is a deficient number, since it is larger than the sum of its proper divisors (1147641357).

111321202123 is an equidigital number, since it uses as much as digits as its factorization.

111321202123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147641356.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 111321202123 its reverse (321202123111), we get a palindrome (432523325234).

It can be divided in two parts, 111 and 321202123, that multiplied together give a palindrome (35653435653).

The spelling of 111321202123 in words is "one hundred eleven billion, three hundred twenty-one million, two hundred two thousand, one hundred twenty-three".