210210020020221 has 24 divisors (see below), whose sum is σ = 303519908629440. Its totient is φ = 129350883257856.

The previous prime is 210210020020213. The next prime is 210210020020223. The reversal of 210210020020221 is 122020020012012.

It is not a de Polignac number, because 210210020020221 - 2³ = 210210020020213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210210020020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210210020020223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7435081 + ... + 21810558.

It is an arithmetic number, because the mean of its divisors is an integer number (12646662859560).

Almost surely, 2^{210210020020221} is an apocalyptic number.

It is an amenable number.

210210020020221 is a deficient number, since it is larger than the sum of its proper divisors (93309888609219).

210210020020221 is a wasteful number, since it uses less digits than its factorization.

210210020020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29259845 (or 29259832 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 210210020020221 its reverse (122020020012012), we get a palindrome (332230040032233).

The spelling of 210210020020221 in words is "two hundred ten trillion, two hundred ten billion, twenty million, twenty thousand, two hundred twenty-one".