212861784113 has 4 divisors (see below), whose sum is σ = 232212855408. Its totient is φ = 193510712820.

The previous prime is 212861784103. The next prime is 212861784119. The reversal of 212861784113 is 311487168212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212861784113 - 2³² = 208566816817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212861784119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9675535631 + ... + 9675535652.

It is an arithmetic number, because the mean of its divisors is an integer number (58053213852).

Almost surely, 2^212861784113 is an apocalyptic number.

It is an amenable number.

212861784113 is a deficient number, since it is larger than the sum of its proper divisors (19351071295).

212861784113 is a wasteful number, since it uses less digits than its factorization.

212861784113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19351071294.

The product of its digits is 129024, while the sum is 44.

The spelling of 212861784113 in words is "two hundred twelve billion, eight hundred sixty-one million, seven hundred eighty-four thousand, one hundred thirteen".