212322199986 has 96 divisors (see below), whose sum is σ = 501016147632. Its totient is φ = 64594575360.

The previous prime is 212322199981. The next prime is 212322199987. The reversal of 212322199986 is 689991223212.

212322199986 is a `hidden beast` number, since 212 + 322 + 19 + 9 + 98 + 6 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 36996599025 + 175325600961 = 192345^2 + 418719^2 .

It is not an unprimeable number, because it can be changed into a prime (212322199981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11122546 + ... + 11141618.

Almost surely, 2^212322199986 is an apocalyptic number.

212322199986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 212322199986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250508073816).

212322199986 is an abundant number, since it is smaller than the sum of its proper divisors (288693947646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212322199986 is a wasteful number, since it uses less digits than its factorization.

212322199986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19628 (or 19625 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The spelling of 212322199986 in words is "two hundred twelve billion, three hundred twenty-two million, one hundred ninety-nine thousand, nine hundred eighty-six".