10212312161 has 4 divisors (see below), whose sum is σ = 10216737300. Its totient is φ = 10207887024.

The previous prime is 10212312137. The next prime is 10212312163. The reversal of 10212312161 is 16121321201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16121321201 = 2897 ⋅5564833.

It can be written as a sum of positive squares in 2 ways, for example, as 8896073761 + 1316238400 = 94319^2 + 36280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10212312161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10212312163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2209106 + ... + 2213723.

It is an arithmetic number, because the mean of its divisors is an integer number (2554184325).

Almost surely, 2^10212312161 is an apocalyptic number.

It is an amenable number.

10212312161 is a deficient number, since it is larger than the sum of its proper divisors (4425139).

10212312161 is an equidigital number, since it uses as much as digits as its factorization.

10212312161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425138.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 10212312161 its reverse (16121321201), we get a palindrome (26333633362).

The spelling of 10212312161 in words is "ten billion, two hundred twelve million, three hundred twelve thousand, one hundred sixty-one".