212785242961 has 4 divisors (see below), whose sum is σ = 212848368624. Its totient is φ = 212722117300.

The previous prime is 212785242953. The next prime is 212785242973. The reversal of 212785242961 is 169242587212.

212785242961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212785242961 - 2³ = 212785242953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212785242661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31557775 + ... + 31564516.

It is an arithmetic number, because the mean of its divisors is an integer number (53212092156).

Almost surely, 2^212785242961 is an apocalyptic number.

It is an amenable number.

212785242961 is a deficient number, since it is larger than the sum of its proper divisors (63125663).

212785242961 is an equidigital number, since it uses as much as digits as its factorization.

212785242961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63125662.

The product of its digits is 967680, while the sum is 49.

The spelling of 212785242961 in words is "two hundred twelve billion, seven hundred eighty-five million, two hundred forty-two thousand, nine hundred sixty-one".