211000201961 has 2 divisors, whose sum is σ = 211000201962. Its totient is φ = 211000201960.

The previous prime is 211000201939. The next prime is 211000202051. The reversal of 211000201961 is 169102000112.

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., 133649467561 + 77350734400 = 365581^2 + 278120^2 .

It is a cyclic number.

It is not a de Polignac number, because 211000201961 - 2⁶ = 211000201897 is a prime.

It is not a weakly prime, because it can be changed into another prime (211000261961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105500100980 + 105500100981.

It is an arithmetic number, because the mean of its divisors is an integer number (105500100981).

Almost surely, 2^211000201961 is an apocalyptic number.

It is an amenable number.

211000201961 is a deficient number, since it is larger than the sum of its proper divisors (1).

211000201961 is an equidigital number, since it uses as much as digits as its factorization.

211000201961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 211000201961 in words is "two hundred eleven billion, two hundred one thousand, nine hundred sixty-one".