210021201010221 has 32 divisors (see below), whose sum is σ = 287034076293120. Its totient is φ = 136556602929600.

The previous prime is 210021201010141. The next prime is 210021201010241. The reversal of 210021201010221 is 122010102120012.

It is not a de Polignac number, because 210021201010221 - 2¹⁹ = 210021200485933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210021201010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021201010241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15558010 + ... + 25731188.

It is an arithmetic number, because the mean of its divisors is an integer number (8969814884160).

Almost surely, 2^{210021201010221} is an apocalyptic number.

It is an amenable number.

210021201010221 is a deficient number, since it is larger than the sum of its proper divisors (77012875282899).

210021201010221 is a wasteful number, since it uses less digits than its factorization.

210021201010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10174297.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210021201010221 its reverse (122010102120012), we get a palindrome (332031303130233).

The spelling of 210021201010221 in words is "two hundred ten trillion, twenty-one billion, two hundred one million, ten thousand, two hundred twenty-one".