120021001321000 has 64 divisors (see below), whose sum is σ = 302452923361680. Its totient is φ = 44315446636800.

The previous prime is 120021001320917. The next prime is 120021001321007. The reversal of 120021001321000 is 123100120021.

It can be written as a sum of positive squares in 8 ways, for example, as 9458340516 + 120011542980484 = 97254^2 + 10954978^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (120021001321007) 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 15 ways as a sum of consecutive naturals, for example, 4616179359 + ... + 4616205358.

Almost surely, 2^{120021001321000} is an apocalyptic number.

120021001321000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120021001321000 is an abundant number, since it is smaller than the sum of its proper divisors (182431922040680).

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

120021001321000 is a wasteful number, since it uses less digits than its factorization.

120021001321000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9232384751 (or 9232384737 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 120021001321000 its reverse (123100120021), we get a palindrome (120144101441021).

The spelling of 120021001321000 in words is "one hundred twenty trillion, twenty-one billion, one million, three hundred twenty-one thousand".