210021820147 has 2 divisors, whose sum is σ = 210021820148. Its totient is φ = 210021820146.

The previous prime is 210021820139. The next prime is 210021820241. The reversal of 210021820147 is 741028120012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210021820147 - 2³ = 210021820139 is a prime.

It is not a weakly prime, because it can be changed into another prime (210021820847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010910073 + 105010910074.

It is an arithmetic number, because the mean of its divisors is an integer number (105010910074).

Almost surely, 2^210021820147 is an apocalyptic number.

210021820147 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021820147 is an equidigital number, since it uses as much as digits as its factorization.

210021820147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 28.

Adding to 210021820147 its reverse (741028120012), we get a palindrome (951049940159).

The spelling of 210021820147 in words is "two hundred ten billion, twenty-one million, eight hundred twenty thousand, one hundred forty-seven".