202133021 has 2 divisors, whose sum is σ = 202133022. Its totient is φ = 202133020.

The previous prime is 202133003. The next prime is 202133023. The reversal of 202133021 is 120331202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191822500 + 10310521 = 13850^2 + 3211^2 .

It is a cyclic number.

It is not a de Polignac number, because 202133021 - 2²⁶ = 135024157 is a prime.

Together with 202133023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 202132987 and 202133005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202133023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101066510 + 101066511.

It is an arithmetic number, because the mean of its divisors is an integer number (101066511).

Almost surely, 2^202133021 is an apocalyptic number.

It is an amenable number.

202133021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202133021 is an equidigital number, since it uses as much as digits as its factorization.

202133021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 202133021 is about 14217.3492958427. The cubic root of 202133021 is about 586.8751972978.

Adding to 202133021 its reverse (120331202), we get a palindrome (322464223).

The spelling of 202133021 in words is "two hundred two million, one hundred thirty-three thousand, twenty-one".