212925616161 has 16 divisors (see below), whose sum is σ = 284225356800. Its totient is φ = 141788235600.

The previous prime is 212925616159. The next prime is 212925616177. The reversal of 212925616161 is 161616529212.

It is a happy number.

It is not a de Polignac number, because 212925616161 - 2¹ = 212925616159 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (212925616061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11167086 + ... + 11186136.

It is an arithmetic number, because the mean of its divisors is an integer number (17764084800).

Almost surely, 2^212925616161 is an apocalyptic number.

It is an amenable number.

212925616161 is a deficient number, since it is larger than the sum of its proper divisors (71299740639).

212925616161 is a wasteful number, since it uses less digits than its factorization.

212925616161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23116.

The product of its digits is 77760, while the sum is 42.

The spelling of 212925616161 in words is "two hundred twelve billion, nine hundred twenty-five million, six hundred sixteen thousand, one hundred sixty-one".