111021320013123 has 16 divisors (see below), whose sum is σ = 159418062868736. Its totient is φ = 68319597687840.

The previous prime is 111021320013113. The next prime is 111021320013133. The reversal of 111021320013123 is 321310023120111.

It is an interprime number because it is at equal distance from previous prime (111021320013113) and next prime (111021320013133).

It is not a de Polignac number, because 111021320013123 - 2⁶ = 111021320013059 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 111021320013123.

It is not an unprimeable number, because it can be changed into a prime (111021320013113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23080465 + ... + 27472722.

It is an arithmetic number, because the mean of its divisors is an integer number (9963628929296).

Almost surely, 2^{111021320013123} is an apocalyptic number.

111021320013123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

111021320013123 is a deficient number, since it is larger than the sum of its proper divisors (48396742855613).

111021320013123 is a wasteful number, since it uses less digits than its factorization.

111021320013123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50609514.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 111021320013123 its reverse (321310023120111), we get a palindrome (432331343133234).

The spelling of 111021320013123 in words is "one hundred eleven trillion, twenty-one billion, three hundred twenty million, thirteen thousand, one hundred twenty-three".