212124025161 has 24 divisors (see below), whose sum is σ = 325047798504. Its totient is φ = 132841912320.

The previous prime is 212124025129. The next prime is 212124025177. The reversal of 212124025161 is 161520421212.

It is a happy number.

212124025161 is a `hidden beast` number, since 2 + 121 + 24 + 0 + 2 + 516 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13011736761 + 199112288400 = 114069^2 + 446220^2 .

It is not a de Polignac number, because 212124025161 - 2⁵ = 212124025129 is a prime.

It is a super-2 number, since 2×212124025161² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212124025111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1250836 + ... + 1410261.

It is an arithmetic number, because the mean of its divisors is an integer number (13543658271).

Almost surely, 2^212124025161 is an apocalyptic number.

It is an amenable number.

212124025161 is a deficient number, since it is larger than the sum of its proper divisors (112923773343).

212124025161 is a wasteful number, since it uses less digits than its factorization.

212124025161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661641 (or 2661638 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

Adding to 212124025161 its reverse (161520421212), we get a palindrome (373644446373).

The spelling of 212124025161 in words is "two hundred twelve billion, one hundred twenty-four million, twenty-five thousand, one hundred sixty-one".