212021155161 has 12 divisors (see below), whose sum is σ = 309114956592. Its totient is φ = 140026432056.

The previous prime is 212021155153. The next prime is 212021155183. The reversal of 212021155161 is 161551120212.

It is a happy number.

212021155161 is a `hidden beast` number, since 2 + 120 + 21 + 1 + 5 + 516 + 1 = 666.

212021155161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212021155161 - 2³ = 212021155153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212021155111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110082711 + ... + 110084636.

It is an arithmetic number, because the mean of its divisors is an integer number (25759579716).

Almost surely, 2^212021155161 is an apocalyptic number.

It is an amenable number.

212021155161 is a deficient number, since it is larger than the sum of its proper divisors (97093801431).

212021155161 is a wasteful number, since it uses less digits than its factorization.

212021155161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220167460 (or 220167457 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

Adding to 212021155161 its reverse (161551120212), we get a palindrome (373572275373).

The spelling of 212021155161 in words is "two hundred twelve billion, twenty-one million, one hundred fifty-five thousand, one hundred sixty-one".