212311432105 has 16 divisors (see below), whose sum is σ = 256853032128. Its totient is φ = 168464296000.

The previous prime is 212311432097. The next prime is 212311432139. The reversal of 212311432105 is 501234113212.

It is not a de Polignac number, because 212311432105 - 2³ = 212311432097 is a prime.

It is a super-2 number, since 2×212311432105² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212311432105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1180875 + ... + 1348735.

It is an arithmetic number, because the mean of its divisors is an integer number (16053314508).

Almost surely, 2^212311432105 is an apocalyptic number.

It is an amenable number.

212311432105 is a deficient number, since it is larger than the sum of its proper divisors (44541600023).

212311432105 is a wasteful number, since it uses less digits than its factorization.

212311432105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169928.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 212311432105 its reverse (501234113212), we get a palindrome (713545545317).

The spelling of 212311432105 in words is "two hundred twelve billion, three hundred eleven million, four hundred thirty-two thousand, one hundred five".