212212025405 has 8 divisors (see below), whose sum is σ = 254656911192. Its totient is φ = 169767966528.

The previous prime is 212212025359. The next prime is 212212025413. The reversal of 212212025405 is 504520212212.

It can be written as a sum of positive squares in 4 ways, for example, as 16141956601 + 196070068804 = 127051^2 + 442798^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212212025405 - 2⁶ = 212212025341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 836147 + ... + 1059983.

It is an arithmetic number, because the mean of its divisors is an integer number (31832113899).

Almost surely, 2^212212025405 is an apocalyptic number.

It is an amenable number.

212212025405 is a deficient number, since it is larger than the sum of its proper divisors (42444885787).

212212025405 is a wasteful number, since it uses less digits than its factorization.

212212025405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413455.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 212212025405 its reverse (504520212212), we get a palindrome (716732237617).

The spelling of 212212025405 in words is "two hundred twelve billion, two hundred twelve million, twenty-five thousand, four hundred five".