120721440000 has 1440 divisors, whose sum is σ = 506749788160. Its totient is φ = 24883200000.

The previous prime is 120721439963. The next prime is 120721440011. The reversal of 120721440000 is 44127021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1979039970 + ... + 1979040030.

Almost surely, 2^120721440000 is an apocalyptic number.

120721440000 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 120721440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253374894080).

120721440000 is an abundant number, since it is smaller than the sum of its proper divisors (386028348160).

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

120721440000 is an equidigital number, since it uses as much as digits as its factorization.

120721440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

Adding to 120721440000 its reverse (44127021), we get a palindrome (120765567021).

The spelling of 120721440000 in words is "one hundred twenty billion, seven hundred twenty-one million, four hundred forty thousand".