212011197 has 4 divisors (see below), whose sum is σ = 282681600. Its totient is φ = 141340796.

The previous prime is 212011193. The next prime is 212011207. The reversal of 212011197 is 791110212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212011197 - 2² = 212011193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35335197 + ... + 35335202.

It is an arithmetic number, because the mean of its divisors is an integer number (70670400).

Almost surely, 2^212011197 is an apocalyptic number.

It is an amenable number.

212011197 is a deficient number, since it is larger than the sum of its proper divisors (70670403).

212011197 is an equidigital number, since it uses as much as digits as its factorization.

212011197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70670402.

The product of its (nonzero) digits is 252, while the sum is 24.

The square root of 212011197 is about 14560.6042800428. The cubic root of 212011197 is about 596.2836931854.

The spelling of 212011197 in words is "two hundred twelve million, eleven thousand, one hundred ninety-seven".