121281204000 has 576 divisors, whose sum is σ = 441577858176. Its totient is φ = 29075200000.

The previous prime is 121281203977. The next prime is 121281204017. The reversal of 121281204000 is 402182121.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 146651587 + ... + 146652413.

It is an arithmetic number, because the mean of its divisors is an integer number (766628226).

Almost surely, 2^121281204000 is an apocalyptic number.

121281204000 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 121281204000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220788929088).

121281204000 is an abundant number, since it is smaller than the sum of its proper divisors (320296654176).

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

121281204000 is a wasteful number, since it uses less digits than its factorization.

121281204000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121281204000 its reverse (402182121), we get a palindrome (121683386121).

The spelling of 121281204000 in words is "one hundred twenty-one billion, two hundred eighty-one million, two hundred four thousand".