121571150720 has 128 divisors (see below), whose sum is σ = 308202783840. Its totient is φ = 45697204224.

The previous prime is 121571150719. The next prime is 121571150791. The reversal of 121571150720 is 27051175121.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7313939 + ... + 7330541.

Almost surely, 2^121571150720 is an apocalyptic number.

121571150720 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 121571150720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154101391920).

121571150720 is an abundant number, since it is smaller than the sum of its proper divisors (186631633120).

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

121571150720 is a wasteful number, since it uses less digits than its factorization.

121571150720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17312 (or 17300 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 32.

The spelling of 121571150720 in words is "one hundred twenty-one billion, five hundred seventy-one million, one hundred fifty thousand, seven hundred twenty".