212145123541 has 12 divisors (see below), whose sum is σ = 229802803392. Its totient is φ = 195755064336.

The previous prime is 212145123517. The next prime is 212145123583. The reversal of 212145123541 is 145321541212.

212145123541 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 212145123541 - 2²³ = 212136734933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212145163541) 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, 240790 + ... + 694456.

It is an arithmetic number, because the mean of its divisors is an integer number (19150233616).

Almost surely, 2^212145123541 is an apocalyptic number.

It is an amenable number.

212145123541 is a deficient number, since it is larger than the sum of its proper divisors (17657679851).

212145123541 is a wasteful number, since it uses less digits than its factorization.

212145123541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456460 (or 456447 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

Adding to 212145123541 its reverse (145321541212), we get a palindrome (357466664753).

The spelling of 212145123541 in words is "two hundred twelve billion, one hundred forty-five million, one hundred twenty-three thousand, five hundred forty-one".