210122222111221 has 8 divisors (see below), whose sum is σ = 240146532280640. Its totient is φ = 180099624408768.

The previous prime is 210122222111177. The next prime is 210122222111231. The reversal of 210122222111221 is 122111222221012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210122222111221 - 2⁹ = 210122222110709 is a prime.

It is a super-2 number, since 2×210122222111221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210122222111192 and 210122222111201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210122222111231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427853796 + ... + 428344621.

It is an arithmetic number, because the mean of its divisors is an integer number (30018316535080).

Almost surely, 2^{210122222111221} is an apocalyptic number.

It is an amenable number.

210122222111221 is a deficient number, since it is larger than the sum of its proper divisors (30024310169419).

210122222111221 is an equidigital number, since it uses as much as digits as its factorization.

210122222111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856233483.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 210122222111221 its reverse (122111222221012), we get a palindrome (332233444332233).

The spelling of 210122222111221 in words is "two hundred ten trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred eleven thousand, two hundred twenty-one".