212768321513 has 4 divisors (see below), whose sum is σ = 232110896208. Its totient is φ = 193425746820.

The previous prime is 212768321503. The next prime is 212768321527. The reversal of 212768321513 is 315123867212.

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 212768321513 - 2⁸ = 212768321257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212768321503) 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, 9671287331 + ... + 9671287352.

It is an arithmetic number, because the mean of its divisors is an integer number (58027724052).

Almost surely, 2^212768321513 is an apocalyptic number.

It is an amenable number.

212768321513 is a deficient number, since it is larger than the sum of its proper divisors (19342574695).

212768321513 is a wasteful number, since it uses less digits than its factorization.

212768321513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19342574694.

The product of its digits is 120960, while the sum is 41.

The spelling of 212768321513 in words is "two hundred twelve billion, seven hundred sixty-eight million, three hundred twenty-one thousand, five hundred thirteen".