121420552000 has 448 divisors, whose sum is σ = 346185695232. Its totient is φ = 41775360000.

The previous prime is 121420551991. The next prime is 121420552003. The reversal of 121420552000 is 255024121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121420552003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 128215527 + ... + 128216473.

Almost surely, 2^121420552000 is an apocalyptic number.

121420552000 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 121420552000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173092847616).

121420552000 is an abundant number, since it is smaller than the sum of its proper divisors (224765143232).

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

121420552000 is a wasteful number, since it uses less digits than its factorization.

121420552000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063 (or 1043 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 121420552000 its reverse (255024121), we get a palindrome (121675576121).

The spelling of 121420552000 in words is "one hundred twenty-one billion, four hundred twenty million, five hundred fifty-two thousand".