20201201002120 has 16 divisors (see below), whose sum is σ = 45452702254860. Its totient is φ = 8080480400832.

The previous prime is 20201201002091. The next prime is 20201201002121. The reversal of 20201201002120 is 2120010210202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18355586372964 + 1845614629156 = 4284342^2 + 1358534^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20201201002120.

It is not an unprimeable number, because it can be changed into a prime (20201201002121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252515012487 + ... + 252515012566.

Almost surely, 2^{20201201002120} is an apocalyptic number.

20201201002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201201002120 is an abundant number, since it is smaller than the sum of its proper divisors (25251501252740).

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

20201201002120 is a wasteful number, since it uses less digits than its factorization.

20201201002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505030025064 (or 505030025060 counting only the distinct ones).

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

Adding to 20201201002120 its reverse (2120010210202), we get a palindrome (22321211212322).

The spelling of 20201201002120 in words is "twenty trillion, two hundred one billion, two hundred one million, two thousand, one hundred twenty".