2121201110323 has 4 divisors (see below), whose sum is σ = 2121219860760. Its totient is φ = 2121182359888.

The previous prime is 2121201110263. The next prime is 2121201110389. The reversal of 2121201110323 is 3230111021212.

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 2121201110323 - 2²⁹ = 2120664239411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121201110323.

It is not an unprimeable number, because it can be changed into a prime (2121201110923) 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, 9204490 + ... + 9432127.

It is an arithmetic number, because the mean of its divisors is an integer number (530304965190).

Almost surely, 2^{2121201110323} is an apocalyptic number.

2121201110323 is a deficient number, since it is larger than the sum of its proper divisors (18750437).

2121201110323 is a wasteful number, since it uses less digits than its factorization.

2121201110323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18750436.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2121201110323 its reverse (3230111021212), we get a palindrome (5351312131535).

The spelling of 2121201110323 in words is "two trillion, one hundred twenty-one billion, two hundred one million, one hundred ten thousand, three hundred twenty-three".