121021000320023 has 4 divisors (see below), whose sum is σ = 121720543674648. Its totient is φ = 120321456965400.

The previous prime is 121021000320013. The next prime is 121021000320047. The reversal of 121021000320023 is 320023000120121.

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 121021000320023 - 2¹⁸ = 121021000057879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121021000319983 and 121021000320010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021000320013) 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, 349771677053 + ... + 349771677398.

It is an arithmetic number, because the mean of its divisors is an integer number (30430135918662).

Almost surely, 2^{121021000320023} is an apocalyptic number.

121021000320023 is a deficient number, since it is larger than the sum of its proper divisors (699543354625).

121021000320023 is an equidigital number, since it uses as much as digits as its factorization.

121021000320023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699543354624.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 121021000320023 its reverse (320023000120121), we get a palindrome (441044000440144).

The spelling of 121021000320023 in words is "one hundred twenty-one trillion, twenty-one billion, three hundred twenty thousand, twenty-three".