1201002120020 has 12 divisors (see below), whose sum is σ = 2522104452084. Its totient is φ = 480400848000.

The previous prime is 1201002120011. The next prime is 1201002120091. The reversal of 1201002120020 is 200212001021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 423243927184 + 777758192836 = 650572^2 + 881906^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1201002119983 and 1201002120010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30025052981 + ... + 30025053020.

It is an arithmetic number, because the mean of its divisors is an integer number (210175371007).

Almost surely, 2^{1201002120020} is an apocalyptic number.

1201002120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201002120020 is an abundant number, since it is smaller than the sum of its proper divisors (1321102332064).

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

1201002120020 is a wasteful number, since it uses less digits than its factorization.

1201002120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60050106010 (or 60050106008 counting only the distinct ones).

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

Adding to 1201002120020 its reverse (200212001021), we get a palindrome (1401214121041).

The spelling of 1201002120020 in words is "one trillion, two hundred one billion, two million, one hundred twenty thousand, twenty".