210021210122201 has 24 divisors (see below), whose sum is σ = 221348160792408. Its totient is φ = 199211870592000.

The previous prime is 210021210122147. The next prime is 210021210122203. The reversal of 210021210122201 is 102221012120012.

It can be written as a sum of positive squares in 12 ways, for example, as 48906930235801 + 161114279886400 = 6993349^2 + 12693080^2 .

It is not a de Polignac number, because 210021210122201 - 2⁶ = 210021210122137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210021210122201.

It is not an unprimeable number, because it can be changed into a prime (210021210122203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39624881 + ... + 44611361.

It is an arithmetic number, because the mean of its divisors is an integer number (9222840033017).

Almost surely, 2^{210021210122201} is an apocalyptic number.

It is an amenable number.

210021210122201 is a deficient number, since it is larger than the sum of its proper divisors (11326950670207).

210021210122201 is an equidigital number, since it uses as much as digits as its factorization.

210021210122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4987421 (or 4987392 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210021210122201 its reverse (102221012120012), we get a palindrome (312242222242213).

The spelling of 210021210122201 in words is "two hundred ten trillion, twenty-one billion, two hundred ten million, one hundred twenty-two thousand, two hundred one".