212011221109997 has 2 divisors, whose sum is σ = 212011221109998. Its totient is φ = 212011221109996.

The previous prime is 212011221109969. The next prime is 212011221110023. The reversal of 212011221109997 is 799901122110212.

It is a happy number.

212011221109997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127403344461481 + 84607876648516 = 11287309^2 + 9198254^2 .

It is a cyclic number.

It is not a de Polignac number, because 212011221109997 - 2²⁶ = 212011154001133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212011221109957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005610554998 + 106005610554999.

It is an arithmetic number, because the mean of its divisors is an integer number (106005610554999).

Almost surely, 2^{212011221109997} is an apocalyptic number.

It is an amenable number.

212011221109997 is a deficient number, since it is larger than the sum of its proper divisors (1).

212011221109997 is an equidigital number, since it uses as much as digits as its factorization.

212011221109997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 47.

The spelling of 212011221109997 in words is "two hundred twelve trillion, eleven billion, two hundred twenty-one million, one hundred nine thousand, nine hundred ninety-seven".