202021223 has 2 divisors, whose sum is σ = 202021224. Its totient is φ = 202021222.

The previous prime is 202021219. The next prime is 202021271. The reversal of 202021223 is 322120202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202021223 - 2² = 202021219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202021198 and 202021207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202021283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101010611 + 101010612.

It is an arithmetic number, because the mean of its divisors is an integer number (101010612).

Almost surely, 2^202021223 is an apocalyptic number.

202021223 is a deficient number, since it is larger than the sum of its proper divisors (1).

202021223 is an equidigital number, since it uses as much as digits as its factorization.

202021223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 202021223 is about 14213.4170064767. The cubic root of 202021223 is about 586.7669788367.

Adding to 202021223 its reverse (322120202), we get a palindrome (524141425).

The spelling of 202021223 in words is "two hundred two million, twenty-one thousand, two hundred twenty-three".