1212201200020 has 48 divisors (see below), whose sum is σ = 2676573219600. Its totient is φ = 460485688320.

The previous prime is 1212201199987. The next prime is 1212201200047. The reversal of 1212201200020 is 200021022121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 66128179716 + 1146073020304 = 257154^2 + 1070548^2 .

It is a congruent number.

It is an unprimeable number.

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, 17095785 + ... + 17166544.

It is an arithmetic number, because the mean of its divisors is an integer number (55761942075).

Almost surely, 2^{1212201200020} is an apocalyptic number.

1212201200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212201200020 is an abundant number, since it is smaller than the sum of its proper divisors (1464372019580).

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

1212201200020 is a wasteful number, since it uses less digits than its factorization.

1212201200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34262428 (or 34262426 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1212201200020 its reverse (200021022121), we get a palindrome (1412222222141).

The spelling of 1212201200020 in words is "one trillion, two hundred twelve billion, two hundred one million, two hundred thousand, twenty".