120021201000 has 96 divisors (see below), whose sum is σ = 405671689800. Its totient is φ = 32005651200.

The previous prime is 120021200983. The next prime is 120021201007. The reversal of 120021201000 is 102120021.

It can be written as a sum of positive squares in 4 ways, for example, as 6426587556 + 113594613444 = 80166^2 + 337038^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (120021201007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6658845 + ... + 6676844.

Almost surely, 2^120021201000 is an apocalyptic number.

120021201000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120021201000 is an abundant number, since it is smaller than the sum of its proper divisors (285650488800).

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

120021201000 is a wasteful number, since it uses less digits than its factorization.

120021201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13335716 (or 13335699 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 120021201000 its reverse (102120021), we get a palindrome (120123321021).

The spelling of 120021201000 in words is "one hundred twenty billion, twenty-one million, two hundred one thousand".