202121212323 has 8 divisors (see below), whose sum is σ = 269498219536. Its totient is φ = 134745840000.

The previous prime is 202121212313. The next prime is 202121212327. The reversal of 202121212323 is 323212121202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202121212323 - 2¹² = 202121208227 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 202121212323.

It is not an unprimeable number, because it can be changed into a prime (202121212327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83218 + ... + 641223.

It is an arithmetic number, because the mean of its divisors is an integer number (33687277442).

Almost surely, 2^202121212323 is an apocalyptic number.

202121212323 is a deficient number, since it is larger than the sum of its proper divisors (67377007213).

202121212323 is an equidigital number, since it uses as much as digits as its factorization.

202121212323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817445.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 202121212323 its reverse (323212121202), we get a palindrome (525333333525).

The spelling of 202121212323 in words is "two hundred two billion, one hundred twenty-one million, two hundred twelve thousand, three hundred twenty-three".