212105244071 has 8 divisors (see below), whose sum is σ = 256665169440. Its totient is φ = 171110112768.

The previous prime is 212105244047. The next prime is 212105244073. The reversal of 212105244071 is 170442501212.

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

It is not a de Polignac number, because 212105244071 - 2⁶ = 212105244007 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 (212105244073) 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, 891198386 + ... + 891198623.

It is an arithmetic number, because the mean of its divisors is an integer number (32083146180).

Almost surely, 2^212105244071 is an apocalyptic number.

212105244071 is a deficient number, since it is larger than the sum of its proper divisors (44559925369).

212105244071 is a wasteful number, since it uses less digits than its factorization.

212105244071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782397033.

The product of its (nonzero) digits is 4480, while the sum is 29.

Adding to 212105244071 its reverse (170442501212), we get a palindrome (382547745283).

The spelling of 212105244071 in words is "two hundred twelve billion, one hundred five million, two hundred forty-four thousand, seventy-one".