212206621149 has 10 divisors (see below), whose sum is σ = 317000014430. Its totient is φ = 141471080712.

The previous prime is 212206621147. The next prime is 212206621243. The reversal of 212206621149 is 941126602212.

It is a happy number.

212206621149 is a `hidden beast` number, since 2 + 1 + 2 + 20 + 6 + 621 + 1 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 210904133049 + 1302488100 = 459243^2 + 36090^2 .

It is not a de Polignac number, because 212206621149 - 2¹ = 212206621147 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 (212206621147) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1309917334 + ... + 1309917495.

It is an arithmetic number, because the mean of its divisors is an integer number (31700001443).

Almost surely, 2^212206621149 is an apocalyptic number.

It is an amenable number.

212206621149 is a deficient number, since it is larger than the sum of its proper divisors (104793393281).

212206621149 is an equidigital number, since it uses as much as digits as its factorization.

212206621149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619834841 (or 2619834832 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 212206621149 in words is "two hundred twelve billion, two hundred six million, six hundred twenty-one thousand, one hundred forty-nine".