121156056000 has 1344 divisors, whose sum is σ = 521458179840. Its totient is φ = 26276659200.

The previous prime is 121156055989. The next prime is 121156056071. The reversal of 121156056000 is 650651121.

It is a happy number.

121156056000 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 56 + 0 + 5 + 600 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1361303956 + ... + 1361304044.

Almost surely, 2^121156056000 is an apocalyptic number.

121156056000 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 121156056000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260729089920).

121156056000 is an abundant number, since it is smaller than the sum of its proper divisors (400302123840).

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

121156056000 is a wasteful number, since it uses less digits than its factorization.

121156056000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 121156056000 in words is "one hundred twenty-one billion, one hundred fifty-six million, fifty-six thousand".