210210221121097 has 2 divisors, whose sum is σ = 210210221121098. Its totient is φ = 210210221121096.

The previous prime is 210210221121083. The next prime is 210210221121113. The reversal of 210210221121097 is 790121122012012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129178249966921 + 81031971154176 = 11365661^2 + 9001776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210210221121097 is a prime.

It is not a weakly prime, because it can be changed into another prime (210210221151097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105105110560548 + 105105110560549.

It is an arithmetic number, because the mean of its divisors is an integer number (105105110560549).

Almost surely, 2^{210210221121097} is an apocalyptic number.

It is an amenable number.

210210221121097 is a deficient number, since it is larger than the sum of its proper divisors (1).

210210221121097 is an equidigital number, since it uses as much as digits as its factorization.

210210221121097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 210210221121097 in words is "two hundred ten trillion, two hundred ten billion, two hundred twenty-one million, one hundred twenty-one thousand, ninety-seven".