121267999836 has 36 divisors (see below), whose sum is σ = 319866320592. Its totient is φ = 38665159104.

The previous prime is 121267999703. The next prime is 121267999841. The reversal of 121267999836 is 638999762121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73228641 + ... + 73230296.

It is an arithmetic number, because the mean of its divisors is an integer number (8885175572).

Almost surely, 2^121267999836 is an apocalyptic number.

It is an amenable number.

121267999836 is an abundant number, since it is smaller than the sum of its proper divisors (198598320756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121267999836 is a wasteful number, since it uses less digits than its factorization.

121267999836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146458970 (or 146458965 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 63.

The spelling of 121267999836 in words is "one hundred twenty-one billion, two hundred sixty-seven million, nine hundred ninety-nine thousand, eight hundred thirty-six".