1200120120020 has 24 divisors (see below), whose sum is σ = 2520705524064. Its totient is φ = 479961710496.

The previous prime is 1200120120007. The next prime is 1200120120037. The reversal of 1200120120020 is 200210210021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1200120119983 and 1200120120010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5282054 + ... + 5504573.

It is an arithmetic number, because the mean of its divisors is an integer number (105029396836).

Almost surely, 2^{1200120120020} is an apocalyptic number.

1200120120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200120120020 is an abundant number, since it is smaller than the sum of its proper divisors (1320585404044).

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

1200120120020 is a wasteful number, since it uses less digits than its factorization.

1200120120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10792199 (or 10792197 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1200120120020 its reverse (200210210021), we get a palindrome (1400330330041).

Subtracting from 1200120120020 its reverse (200210210021), we obtain a palindrome (999909909999).

The spelling of 1200120120020 in words is "one trillion, two hundred billion, one hundred twenty million, one hundred twenty thousand, twenty".