210122444221021 has 2 divisors, whose sum is σ = 210122444221022. Its totient is φ = 210122444221020.

The previous prime is 210122444220973. The next prime is 210122444221091. The reversal of 210122444221021 is 120122444221012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209445585895225 + 676858325796 = 14472235^2 + 822714^2 .

It is a cyclic number.

It is not a de Polignac number, because 210122444221021 - 2⁴³ = 201326351198813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210122444221091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061222110510 + 105061222110511.

It is an arithmetic number, because the mean of its divisors is an integer number (105061222110511).

Almost surely, 2^{210122444221021} is an apocalyptic number.

It is an amenable number.

210122444221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

210122444221021 is an equidigital number, since it uses as much as digits as its factorization.

210122444221021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4096, while the sum is 28.

Adding to 210122444221021 its reverse (120122444221012), we get a palindrome (330244888442033).

Subtracting from 210122444221021 its reverse (120122444221012), we obtain a palindrome (90000000000009).

The spelling of 210122444221021 in words is "two hundred ten trillion, one hundred twenty-two billion, four hundred forty-four million, two hundred twenty-one thousand, twenty-one".