121221203210023 has 12 divisors (see below), whose sum is σ = 141146589882792. Its totient is φ = 103805026491600.

The previous prime is 121221203210021. The next prime is 121221203210027. The reversal of 121221203210023 is 320012302122121.

It is not a de Polignac number, because 121221203210023 - 2¹ = 121221203210021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121221203209976 and 121221203210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221203210021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1176876240 + ... + 1176979237.

It is an arithmetic number, because the mean of its divisors is an integer number (11762215823566).

Almost surely, 2^{121221203210023} is an apocalyptic number.

121221203210023 is a deficient number, since it is larger than the sum of its proper divisors (19925386672769).

121221203210023 is a wasteful number, since it uses less digits than its factorization.

121221203210023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353856542 (or 2353856535 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 121221203210023 its reverse (320012302122121), we get a palindrome (441233505332144).

The spelling of 121221203210023 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred three million, two hundred ten thousand, twenty-three".