121656441088 has 216 divisors, whose sum is σ = 307210158528. Its totient is φ = 47653982208.

The previous prime is 121656441031. The next prime is 121656441089. The reversal of 121656441088 is 880144656121.

It is not an unprimeable number, because it can be changed into a prime (121656441089) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16792795 + ... + 16800037.

Almost surely, 2^121656441088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121656441088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153605079264).

121656441088 is an abundant number, since it is smaller than the sum of its proper divisors (185553717440).

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

121656441088 is a wasteful number, since it uses less digits than its factorization.

121656441088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7389 (or 7368 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 46.

The spelling of 121656441088 in words is "one hundred twenty-one billion, six hundred fifty-six million, four hundred forty-one thousand, eighty-eight".