212204202443405 has 32 divisors (see below), whose sum is σ = 259177167849600. Its totient is φ = 166749788171520.

The previous prime is 212204202443381. The next prime is 212204202443411. The reversal of 212204202443405 is 504344202402212.

It is a de Polignac number, because none of the positive numbers 2^k-212204202443405 is a prime.

It is a super-2 number, since 2×212204202443405² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 675762371 + ... + 676076319.

It is an arithmetic number, because the mean of its divisors is an integer number (8099286495300).

Almost surely, 2^{212204202443405} is an apocalyptic number.

It is an amenable number.

212204202443405 is a deficient number, since it is larger than the sum of its proper divisors (46972965406195).

212204202443405 is a wasteful number, since it uses less digits than its factorization.

212204202443405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317069.

The product of its (nonzero) digits is 122880, while the sum is 35.

Adding to 212204202443405 its reverse (504344202402212), we get a palindrome (716548404845617).

The spelling of 212204202443405 in words is "two hundred twelve trillion, two hundred four billion, two hundred two million, four hundred forty-three thousand, four hundred five".