67991121212102 has 96 divisors (see below), whose sum is σ = 117276646265856. Its totient is φ = 29485184826240.

The previous prime is 67991121212057. The next prime is 67991121212159. The reversal of 67991121212102 is 20121212119976.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11708473283 + ... + 11708479089.

It is an arithmetic number, because the mean of its divisors is an integer number (1221631731936).

Almost surely, 2^{67991121212102} is an apocalyptic number.

67991121212102 is a deficient number, since it is larger than the sum of its proper divisors (49285525053754).

67991121212102 is a wasteful number, since it uses less digits than its factorization.

67991121212102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10914 (or 10903 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 44.

The spelling of 67991121212102 in words is "sixty-seven trillion, nine hundred ninety-one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred two".