210120012201221 has 4 divisors (see below), whose sum is σ = 210120706603872. Its totient is φ = 210119317798572.

The previous prime is 210120012201217. The next prime is 210120012201259. The reversal of 210120012201221 is 122102210021012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210120012201221 - 2² = 210120012201217 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 210120012201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120012231221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346747241 + ... + 347352686.

It is an arithmetic number, because the mean of its divisors is an integer number (52530176650968).

Almost surely, 2^{210120012201221} is an apocalyptic number.

It is an amenable number.

210120012201221 is a deficient number, since it is larger than the sum of its proper divisors (694402651).

210120012201221 is an equidigital number, since it uses as much as digits as its factorization.

210120012201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694402650.

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

Adding to 210120012201221 its reverse (122102210021012), we get a palindrome (332222222222233).

The spelling of 210120012201221 in words is "two hundred ten trillion, one hundred twenty billion, twelve million, two hundred one thousand, two hundred twenty-one".