121111320023 has 4 divisors (see below), whose sum is σ = 121136097120. Its totient is φ = 121086542928.

The previous prime is 121111320017. The next prime is 121111320107. The reversal of 121111320023 is 320023111121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320023111121 = 7 ⋅45717587303.

It is a cyclic number.

It is not a de Polignac number, because 121111320023 - 2¹⁶ = 121111254487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121111319983 and 121111320010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111320223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12381215 + ... + 12390992.

It is an arithmetic number, because the mean of its divisors is an integer number (30284024280).

Almost surely, 2^121111320023 is an apocalyptic number.

121111320023 is a deficient number, since it is larger than the sum of its proper divisors (24777097).

121111320023 is an equidigital number, since it uses as much as digits as its factorization.

121111320023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24777096.

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

Adding to 121111320023 its reverse (320023111121), we get a palindrome (441134431144).

The spelling of 121111320023 in words is "one hundred twenty-one billion, one hundred eleven million, three hundred twenty thousand, twenty-three".