201652021 has 2 divisors, whose sum is σ = 201652022. Its totient is φ = 201652020.

The previous prime is 201652019. The next prime is 201652037. The reversal of 201652021 is 120256102.

201652021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190854225 + 10797796 = 13815^2 + 3286^2 .

It is a cyclic number.

It is not a de Polignac number, because 201652021 - 2¹ = 201652019 is a prime.

Together with 201652019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 201652021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201652091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100826010 + 100826011.

It is an arithmetic number, because the mean of its divisors is an integer number (100826011).

Almost surely, 2^201652021 is an apocalyptic number.

It is an amenable number.

201652021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201652021 is an equidigital number, since it uses as much as digits as its factorization.

201652021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 201652021 is about 14200.4232683396. The cubic root of 201652021 is about 586.4093140278.

The spelling of 201652021 in words is "two hundred one million, six hundred fifty-two thousand, twenty-one".