212011011197 has 2 divisors, whose sum is σ = 212011011198. Its totient is φ = 212011011196.

The previous prime is 212011011139. The next prime is 212011011211. The reversal of 212011011197 is 791110110212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135196671481 + 76814339716 = 367691^2 + 277154^2 .

It is a cyclic number.

It is not a de Polignac number, because 212011011197 - 2¹⁰ = 212011010173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212011011397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005505598 + 106005505599.

It is an arithmetic number, because the mean of its divisors is an integer number (106005505599).

Almost surely, 2^212011011197 is an apocalyptic number.

It is an amenable number.

212011011197 is a deficient number, since it is larger than the sum of its proper divisors (1).

212011011197 is an equidigital number, since it uses as much as digits as its factorization.

212011011197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 26.

The spelling of 212011011197 in words is "two hundred twelve billion, eleven million, eleven thousand, one hundred ninety-seven".