210211101202121 has 2 divisors, whose sum is σ = 210211101202122. Its totient is φ = 210211101202120.

The previous prime is 210211101202057. The next prime is 210211101202159. The reversal of 210211101202121 is 121202101112012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156126549393721 + 54084551808400 = 12495061^2 + 7354220^2 .

It is a cyclic number.

It is not a de Polignac number, because 210211101202121 - 2⁶ = 210211101202057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210211101202121.

It is not a weakly prime, because it can be changed into another prime (210211101202021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105105550601060 + 105105550601061.

It is an arithmetic number, because the mean of its divisors is an integer number (105105550601061).

Almost surely, 2^{210211101202121} is an apocalyptic number.

It is an amenable number.

210211101202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210211101202121 is an equidigital number, since it uses as much as digits as its factorization.

210211101202121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210211101202121 its reverse (121202101112012), we get a palindrome (331413202314133).

The spelling of 210211101202121 in words is "two hundred ten trillion, two hundred eleven billion, one hundred one million, two hundred two thousand, one hundred twenty-one".