202193021 has 2 divisors, whose sum is σ = 202193022. Its totient is φ = 202193020.

The previous prime is 202192993. The next prime is 202193027. The reversal of 202193021 is 120391202.

202193021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102292996 + 99900025 = 10114^2 + 9995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202193021 is a prime.

It is a super-2 number, since 2×202193021² = 81764035482212882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202192984 and 202193002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202193027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101096510 + 101096511.

It is an arithmetic number, because the mean of its divisors is an integer number (101096511).

Almost surely, 2^202193021 is an apocalyptic number.

It is an amenable number.

202193021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202193021 is an equidigital number, since it uses as much as digits as its factorization.

202193021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 202193021 is about 14219.4592372565. The cubic root of 202193021 is about 586.9332597693.

The spelling of 202193021 in words is "two hundred two million, one hundred ninety-three thousand, twenty-one".