2121120321323 has 4 divisors (see below), whose sum is σ = 2121548230320. Its totient is φ = 2120692412328.

The previous prime is 2121120321317. The next prime is 2121120321347. The reversal of 2121120321323 is 3231230211212.

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 2121120321323 - 2²⁴ = 2121103544107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121120320323) 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, 213947063 + ... + 213956976.

It is an arithmetic number, because the mean of its divisors is an integer number (530387057580).

Almost surely, 2^{2121120321323} is an apocalyptic number.

2121120321323 is a deficient number, since it is larger than the sum of its proper divisors (427908997).

2121120321323 is an equidigital number, since it uses as much as digits as its factorization.

2121120321323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427908996.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2121120321323 its reverse (3231230211212), we get a palindrome (5352350532535).

The spelling of 2121120321323 in words is "two trillion, one hundred twenty-one billion, one hundred twenty million, three hundred twenty-one thousand, three hundred twenty-three".