210122222021021 has 4 divisors (see below), whose sum is σ = 210159287156700. Its totient is φ = 210085156885344.

The previous prime is 210122222021009. The next prime is 210122222021059. The reversal of 210122222021021 is 120120222221012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92691644522500 + 117430577498521 = 9627650^2 + 10836539^2 .

It is a cyclic number.

It is not a de Polignac number, because 210122222021021 - 2²⁶ = 210122154912157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210122222020984 and 210122222021002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210122222021071) 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, 18532559336 + ... + 18532570673.

It is an arithmetic number, because the mean of its divisors is an integer number (52539821789175).

Almost surely, 2^{210122222021021} is an apocalyptic number.

It is an amenable number.

210122222021021 is a deficient number, since it is larger than the sum of its proper divisors (37065135679).

210122222021021 is an equidigital number, since it uses as much as digits as its factorization.

210122222021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37065135678.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 210122222021021 its reverse (120120222221012), we get a palindrome (330242444242033).

The spelling of 210122222021021 in words is "two hundred ten trillion, one hundred twenty-two billion, two hundred twenty-two million, twenty-one thousand, twenty-one".