210022122721121 has 2 divisors, whose sum is σ = 210022122721122. Its totient is φ = 210022122721120.

The previous prime is 210022122721111. The next prime is 210022122721133. The reversal of 210022122721121 is 121127221220012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210012846912400 + 9275808721 = 14491820^2 + 96311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210022122721121 is a prime.

It is not a weakly prime, because it can be changed into another prime (210022122721111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105011061360560 + 105011061360561.

It is an arithmetic number, because the mean of its divisors is an integer number (105011061360561).

Almost surely, 2^{210022122721121} is an apocalyptic number.

It is an amenable number.

210022122721121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210022122721121 is an equidigital number, since it uses as much as digits as its factorization.

210022122721121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 26.

Adding to 210022122721121 its reverse (121127221220012), we get a palindrome (331149343941133).

The spelling of 210022122721121 in words is "two hundred ten trillion, twenty-two billion, one hundred twenty-two million, seven hundred twenty-one thousand, one hundred twenty-one".