121964661100 has 36 divisors (see below), whose sum is σ = 265639991008. Its totient is φ = 48605832000.

The previous prime is 121964661061. The next prime is 121964661157. The reversal of 121964661100 is 1166469121.

It is a self number, because there is not a number n which added to its sum of digits gives 121964661100.

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, 2223171 + ... + 2277370.

Almost surely, 2^121964661100 is an apocalyptic number.

121964661100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121964661100 is an abundant number, since it is smaller than the sum of its proper divisors (143675329908).

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

121964661100 is a wasteful number, since it uses less digits than its factorization.

121964661100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500826 (or 4500819 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 121964661100 in words is "one hundred twenty-one billion, nine hundred sixty-four million, six hundred sixty-one thousand, one hundred".