10211209961 has 2 divisors, whose sum is σ = 10211209962. Its totient is φ = 10211209960.

The previous prime is 10211209951. The next prime is 10211209969. The reversal of 10211209961 is 16990211201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10129416025 + 81793936 = 100645^2 + 9044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10211209961 is a prime.

It is not a weakly prime, because it can be changed into another prime (10211209969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105604980 + 5105604981.

It is an arithmetic number, because the mean of its divisors is an integer number (5105604981).

Almost surely, 2^10211209961 is an apocalyptic number.

It is an amenable number.

10211209961 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211209961 is an equidigital number, since it uses as much as digits as its factorization.

10211209961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 10211209961 in words is "ten billion, two hundred eleven million, two hundred nine thousand, nine hundred sixty-one".