210221201027 has 2 divisors, whose sum is σ = 210221201028. Its totient is φ = 210221201026.

The previous prime is 210221200963. The next prime is 210221201033. The reversal of 210221201027 is 720102122012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210221201027 - 2⁶ = 210221200963 is a prime.

It is a super-2 number, since 2×210221201027² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210221201327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110600513 + 105110600514.

It is an arithmetic number, because the mean of its divisors is an integer number (105110600514).

Almost surely, 2^210221201027 is an apocalyptic number.

210221201027 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221201027 is an equidigital number, since it uses as much as digits as its factorization.

210221201027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 210221201027 its reverse (720102122012), we get a palindrome (930323323039).

The spelling of 210221201027 in words is "two hundred ten billion, two hundred twenty-one million, two hundred one thousand, twenty-seven".