120021210018 has 24 divisors (see below), whose sum is σ = 260053575600. Its totient is φ = 40005897624.

The previous prime is 120021210007. The next prime is 120021210061. The reversal of 120021210018 is 810012120021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 717393 + ... + 868731.

It is an arithmetic number, because the mean of its divisors is an integer number (10835565650).

Almost surely, 2^120021210018 is an apocalyptic number.

120021210018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

120021210018 is an abundant number, since it is smaller than the sum of its proper divisors (140032365582).

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

120021210018 is a wasteful number, since it uses less digits than its factorization.

120021210018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195406 (or 195403 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 120021210018 its reverse (810012120021), we get a palindrome (930033330039).

The spelling of 120021210018 in words is "one hundred twenty billion, twenty-one million, two hundred ten thousand, eighteen".