121101111023 has 4 divisors (see below), whose sum is σ = 122908590360. Its totient is φ = 119293631688.

The previous prime is 121101111013. The next prime is 121101111029. The reversal of 121101111023 is 320111101121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121101111023 - 2⁴ = 121101111007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121101110989 and 121101111007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101111029) 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, 903739568 + ... + 903739701.

It is an arithmetic number, because the mean of its divisors is an integer number (30727147590).

Almost surely, 2^121101111023 is an apocalyptic number.

121101111023 is a deficient number, since it is larger than the sum of its proper divisors (1807479337).

121101111023 is an equidigital number, since it uses as much as digits as its factorization.

121101111023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807479336.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 121101111023 its reverse (320111101121), we get a palindrome (441212212144).

The spelling of 121101111023 in words is "one hundred twenty-one billion, one hundred one million, one hundred eleven thousand, twenty-three".