212133310100405 has 8 divisors (see below), whose sum is σ = 254563284017112. Its totient is φ = 169704440149248.

The previous prime is 212133310100311. The next prime is 212133310100407. The reversal of 212133310100405 is 504001013331212.

It can be written as a sum of positive squares in 4 ways, for example, as 41884415281489 + 170248894818916 = 6471817^2 + 13047946^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212133310100405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212133310100407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275568584 + ... + 276337313.

It is an arithmetic number, because the mean of its divisors is an integer number (31820410502139).

Almost surely, 2^{212133310100405} is an apocalyptic number.

It is an amenable number.

212133310100405 is a deficient number, since it is larger than the sum of its proper divisors (42429973916707).

212133310100405 is an equidigital number, since it uses as much as digits as its factorization.

212133310100405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551982775.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 212133310100405 its reverse (504001013331212), we get a palindrome (716134323431617).

The spelling of 212133310100405 in words is "two hundred twelve trillion, one hundred thirty-three billion, three hundred ten million, one hundred thousand, four hundred five".