202120021323 has 96 divisors (see below), whose sum is σ = 348005279232. Its totient is φ = 111636403200.

The previous prime is 202120021319. The next prime is 202120021387. The reversal of 202120021323 is 323120021202.

202120021323 is a `hidden beast` number, since 202 + 120 + 0 + 21 + 323 = 666.

It is not a de Polignac number, because 202120021323 - 2² = 202120021319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202120021296 and 202120021305.

It is not an unprimeable number, because it can be changed into a prime (202120021393) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13131490 + ... + 13146872.

It is an arithmetic number, because the mean of its divisors is an integer number (3625054992).

Almost surely, 2^202120021323 is an apocalyptic number.

202120021323 is a deficient number, since it is larger than the sum of its proper divisors (145885257909).

202120021323 is a wasteful number, since it uses less digits than its factorization.

202120021323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15665 (or 15662 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 202120021323 its reverse (323120021202), we get a palindrome (525240042525).

The spelling of 202120021323 in words is "two hundred two billion, one hundred twenty million, twenty-one thousand, three hundred twenty-three".