201210122197961 has 2 divisors, whose sum is σ = 201210122197962. Its totient is φ = 201210122197960.

The previous prime is 201210122197913. The next prime is 201210122197967. The reversal of 201210122197961 is 169791221012102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147359108392336 + 53851013805625 = 12139156^2 + 7338325^2 .

It is a cyclic number.

It is not a de Polignac number, because 201210122197961 - 2¹⁴ = 201210122181577 is a prime.

It is not a weakly prime, because it can be changed into another prime (201210122197967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605061098980 + 100605061098981.

It is an arithmetic number, because the mean of its divisors is an integer number (100605061098981).

Almost surely, 2^{201210122197961} is an apocalyptic number.

It is an amenable number.

201210122197961 is a deficient number, since it is larger than the sum of its proper divisors (1).

201210122197961 is an equidigital number, since it uses as much as digits as its factorization.

201210122197961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 44.

The spelling of 201210122197961 in words is "two hundred one trillion, two hundred ten billion, one hundred twenty-two million, one hundred ninety-seven thousand, nine hundred sixty-one".