202233023021 has 4 divisors (see below), whose sum is σ = 202727480700. Its totient is φ = 201738565344.

The previous prime is 202233023011. The next prime is 202233023033. The reversal of 202233023021 is 120320332202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71615112100 + 130617910921 = 267610^2 + 361411^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202233023021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202233022984 and 202233023002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202233023011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247228226 + ... + 247229043.

It is an arithmetic number, because the mean of its divisors is an integer number (50681870175).

Almost surely, 2^202233023021 is an apocalyptic number.

It is an amenable number.

202233023021 is a deficient number, since it is larger than the sum of its proper divisors (494457679).

202233023021 is an equidigital number, since it uses as much as digits as its factorization.

202233023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494457678.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 202233023021 its reverse (120320332202), we get a palindrome (322553355223).

The spelling of 202233023021 in words is "two hundred two billion, two hundred thirty-three million, twenty-three thousand, twenty-one".