210122001201221 has 16 divisors (see below), whose sum is σ = 213326317093248. Its totient is φ = 206924508100800.

The previous prime is 210122001201197. The next prime is 210122001201263. The reversal of 210122001201221 is 122102100221012.

It is a cyclic number.

It is not a de Polignac number, because 210122001201221 - 2¹⁰ = 210122001200197 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 210122001201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210122001201521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1669944491 + ... + 1670070311.

It is an arithmetic number, because the mean of its divisors is an integer number (13332894818328).

Almost surely, 2^{210122001201221} is an apocalyptic number.

It is an amenable number.

210122001201221 is a deficient number, since it is larger than the sum of its proper divisors (3204315892027).

210122001201221 is a wasteful number, since it uses less digits than its factorization.

210122001201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152732.

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

Adding to 210122001201221 its reverse (122102100221012), we get a palindrome (332224101422233).

The spelling of 210122001201221 in words is "two hundred ten trillion, one hundred twenty-two billion, one million, two hundred one thousand, two hundred twenty-one".