212454114665 has 16 divisors (see below), whose sum is σ = 275533178256. Its totient is φ = 156330854400.

The previous prime is 212454114661. The next prime is 212454114701. The reversal of 212454114665 is 566411454212.

It can be written as a sum of positive squares in 8 ways, for example, as 1564677136 + 210889437529 = 39556^2 + 459227^2 .

It is not a de Polignac number, because 212454114665 - 2² = 212454114661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212454114661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5797616 + ... + 5834145.

It is an arithmetic number, because the mean of its divisors is an integer number (17220823641).

Almost surely, 2^212454114665 is an apocalyptic number.

It is an amenable number.

212454114665 is a deficient number, since it is larger than the sum of its proper divisors (63079063591).

212454114665 is a wasteful number, since it uses less digits than its factorization.

212454114665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11632060.

The product of its digits is 230400, while the sum is 41.

Adding to 212454114665 its reverse (566411454212), we get a palindrome (778865568877).

The spelling of 212454114665 in words is "two hundred twelve billion, four hundred fifty-four million, one hundred fourteen thousand, six hundred sixty-five".