121229521600 has 336 divisors, whose sum is σ = 341195412096. Its totient is φ = 41997312000.

The previous prime is 121229521597. The next prime is 121229521607. The reversal of 121229521600 is 6125922121.

It is not an unprimeable number, because it can be changed into a prime (121229521607) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 31026847 + ... + 31030753.

It is an arithmetic number, because the mean of its divisors is an integer number (1015462536).

Almost surely, 2^121229521600 is an apocalyptic number.

121229521600 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 121229521600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170597706048).

121229521600 is an abundant number, since it is smaller than the sum of its proper divisors (219965890496).

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

121229521600 is a wasteful number, since it uses less digits than its factorization.

121229521600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4024 (or 4009 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 121229521600 in words is "one hundred twenty-one billion, two hundred twenty-nine million, five hundred twenty-one thousand, six hundred".