202021121323 has 8 divisors (see below), whose sum is σ = 235593144800. Its totient is φ = 173160960840.

The previous prime is 202021121303. The next prime is 202021121399. The reversal of 202021121323 is 323121120202.

It is not a de Polignac number, because 202021121323 - 2²¹ = 202019024171 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 202021121323.

It is not an unprimeable number, because it can be changed into a prime (202021121303) 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, 294491088 + ... + 294491773.

It is an arithmetic number, because the mean of its divisors is an integer number (29449143100).

Almost surely, 2^202021121323 is an apocalyptic number.

202021121323 is a deficient number, since it is larger than the sum of its proper divisors (33572023477).

202021121323 is an frugal number, since it uses more digits than its factorization.

202021121323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588982882 (or 588982868 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 202021121323 its reverse (323121120202), we get a palindrome (525142241525).

The spelling of 202021121323 in words is "two hundred two billion, twenty-one million, one hundred twenty-one thousand, three hundred twenty-three".