212950820061 has 48 divisors (see below), whose sum is σ = 370454273280. Its totient is φ = 115242969600.

The previous prime is 212950820051. The next prime is 212950820101. The reversal of 212950820061 is 160028059212.

212950820061 is a `hidden beast` number, since 2 + 129 + 508 + 20 + 0 + 6 + 1 = 666.

It is not a de Polignac number, because 212950820061 - 2³⁵ = 178591081693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212950819998 and 212950820025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212950820011) 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, 581196 + ... + 873893.

It is an arithmetic number, because the mean of its divisors is an integer number (7717797360).

Almost surely, 2^212950820061 is an apocalyptic number.

212950820061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212950820061 is a deficient number, since it is larger than the sum of its proper divisors (157503453219).

212950820061 is a wasteful number, since it uses less digits than its factorization.

212950820061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455226 (or 1455223 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

Adding to 212950820061 its reverse (160028059212), we get a palindrome (372978879273).

The spelling of 212950820061 in words is "two hundred twelve billion, nine hundred fifty million, eight hundred twenty thousand, sixty-one".