67122213812 has 12 divisors (see below), whose sum is σ = 117465687780. Its totient is φ = 33560588736.

The previous prime is 67122213799. The next prime is 67122213817. The reversal of 67122213812 is 21831222176.

It can be written as a sum of positive squares in 2 ways, for example, as 54608211856 + 12514001956 = 233684^2 + 111866^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67122213817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449288 + ... + 579744.

It is an arithmetic number, because the mean of its divisors is an integer number (9788807315).

Almost surely, 2^67122213812 is an apocalyptic number.

It is an amenable number.

67122213812 is a deficient number, since it is larger than the sum of its proper divisors (50343473968).

67122213812 is a wasteful number, since it uses less digits than its factorization.

67122213812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259090 (or 259088 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

Adding to 67122213812 its reverse (21831222176), we get a palindrome (88953435988).

The spelling of 67122213812 in words is "sixty-seven billion, one hundred twenty-two million, two hundred thirteen thousand, eight hundred twelve".