121673309940 has 288 divisors, whose sum is σ = 458935975680. Its totient is φ = 25406742528.

The previous prime is 121673309909. The next prime is 121673309977. The reversal of 121673309940 is 49903376121.

121673309940 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1550571 + ... + 1627149.

Almost surely, 2^121673309940 is an apocalyptic number.

121673309940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121673309940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229467987840).

121673309940 is an abundant number, since it is smaller than the sum of its proper divisors (337262665740).

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

121673309940 is a wasteful number, since it uses less digits than its factorization.

121673309940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76711 (or 76706 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 121673309940 in words is "one hundred twenty-one billion, six hundred seventy-three million, three hundred nine thousand, nine hundred forty".