212822814869 has 4 divisors (see below), whose sum is σ = 243226074144. Its totient is φ = 182419555596.

The previous prime is 212822814823. The next prime is 212822814961. The reversal of 212822814869 is 968418228212.

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 212822814869 - 2¹⁶ = 212822749333 is a prime.

It is a super-2 number, since 2×212822814869² (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 212822814869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212822814769) 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, 15201629627 + ... + 15201629640.

It is an arithmetic number, because the mean of its divisors is an integer number (60806518536).

Almost surely, 2^212822814869 is an apocalyptic number.

It is an amenable number.

212822814869 is a deficient number, since it is larger than the sum of its proper divisors (30403259275).

212822814869 is an equidigital number, since it uses as much as digits as its factorization.

212822814869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30403259274.

The product of its digits is 1769472, while the sum is 53.

The spelling of 212822814869 in words is "two hundred twelve billion, eight hundred twenty-two million, eight hundred fourteen thousand, eight hundred sixty-nine".