200072021 has 2 divisors, whose sum is σ = 200072022. Its totient is φ = 200072020.

The previous prime is 200071981. The next prime is 200072039. The reversal of 200072021 is 120270002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104325796 + 95746225 = 10214^2 + 9785^2 .

It is a cyclic number.

It is not a de Polignac number, because 200072021 - 2¹⁴ = 200055637 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 200071987 and 200072005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200072321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100036010 + 100036011.

It is an arithmetic number, because the mean of its divisors is an integer number (100036011).

Almost surely, 2^200072021 is an apocalyptic number.

It is an amenable number.

200072021 is a deficient number, since it is larger than the sum of its proper divisors (1).

200072021 is an equidigital number, since it uses as much as digits as its factorization.

200072021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 200072021 is about 14144.6817214103. The cubic root of 200072021 is about 584.8737361120.

The spelling of 200072021 in words is "two hundred million, seventy-two thousand, twenty-one".