10011121211209 has 2 divisors, whose sum is σ = 10011121211210. Its totient is φ = 10011121211208.

The previous prime is 10011121211197. The next prime is 10011121211233. The reversal of 10011121211209 is 90211212111001.

It is a happy number.

10011121211209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9524803267984 + 486317943225 = 3086228^2 + 697365^2 .

It is a cyclic number.

It is not a de Polignac number, because 10011121211209 - 2¹⁹ = 10011120686921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10011121211209.

It is not a weakly prime, because it can be changed into another prime (10011121221209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005560605604 + 5005560605605.

It is an arithmetic number, because the mean of its divisors is an integer number (5005560605605).

Almost surely, 2^{10011121211209} is an apocalyptic number.

It is an amenable number.

10011121211209 is a deficient number, since it is larger than the sum of its proper divisors (1).

10011121211209 is an equidigital number, since it uses as much as digits as its factorization.

10011121211209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 10011121211209 in words is "ten trillion, eleven billion, one hundred twenty-one million, two hundred eleven thousand, two hundred nine".