121550770000 has 200 divisors, whose sum is σ = 322623002592. Its totient is φ = 43982400000.

The previous prime is 121550769997. The next prime is 121550770013. The reversal of 121550770000 is 77055121.

It is a tau number, because it is divible by the number of its divisors (200).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 23207382 + ... + 23212618.

Almost surely, 2^121550770000 is an apocalyptic number.

121550770000 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 121550770000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161311501296).

121550770000 is an abundant number, since it is smaller than the sum of its proper divisors (201072232592).

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

121550770000 is a wasteful number, since it uses less digits than its factorization.

121550770000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5487 (or 5466 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 28.

The spelling of 121550770000 in words is "one hundred twenty-one billion, five hundred fifty million, seven hundred seventy thousand".