210212200121021 has 48 divisors (see below), whose sum is σ = 259545571505280. Its totient is φ = 169389953631360.

The previous prime is 210212200121003. The next prime is 210212200121059. The reversal of 210212200121021 is 120121002212012.

It is not a de Polignac number, because 210212200121021 - 2⁶ = 210212200120957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210212200121221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 307987151 + ... + 308668931.

It is an arithmetic number, because the mean of its divisors is an integer number (5407199406360).

Almost surely, 2^{210212200121021} is an apocalyptic number.

It is an amenable number.

210212200121021 is a deficient number, since it is larger than the sum of its proper divisors (49333371384259).

210212200121021 is a wasteful number, since it uses less digits than its factorization.

210212200121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686514 (or 686507 counting only the distinct ones).

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

Adding to 210212200121021 its reverse (120121002212012), we get a palindrome (330333202333033).

The spelling of 210212200121021 in words is "two hundred ten trillion, two hundred twelve billion, two hundred million, one hundred twenty-one thousand, twenty-one".