121211099964 has 18 divisors (see below), whose sum is σ = 306394725000. Its totient is φ = 40403699976.

The previous prime is 121211099939. The next prime is 121211099983. The reversal of 121211099964 is 469990112121.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1683487464 + ... + 1683487535.

Almost surely, 2^121211099964 is an apocalyptic number.

It is an amenable number.

121211099964 is an abundant number, since it is smaller than the sum of its proper divisors (185183625036).

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

121211099964 is a wasteful number, since it uses less digits than its factorization.

121211099964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366975009 (or 3366975004 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The spelling of 121211099964 in words is "one hundred twenty-one billion, two hundred eleven million, ninety-nine thousand, nine hundred sixty-four".