210122222021221 has 4 divisors (see below), whose sum is σ = 210122690149792. Its totient is φ = 210121753892652.

The previous prime is 210122222021219. The next prime is 210122222021281. The reversal of 210122222021221 is 122120222221012.

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 210122222021221 - 2¹ = 210122222021219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210122222021192 and 210122222021201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210122222021281) 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, 233390355 + ... + 234288928.

It is an arithmetic number, because the mean of its divisors is an integer number (52530672537448).

Almost surely, 2^{210122222021221} is an apocalyptic number.

It is an amenable number.

210122222021221 is a deficient number, since it is larger than the sum of its proper divisors (468128571).

210122222021221 is an equidigital number, since it uses as much as digits as its factorization.

210122222021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468128570.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 210122222021221 its reverse (122120222221012), we get a palindrome (332242444242233).

The spelling of 210122222021221 in words is "two hundred ten trillion, one hundred twenty-two billion, two hundred twenty-two million, twenty-one thousand, two hundred twenty-one".