20000120202100 has 36 divisors (see below), whose sum is σ = 43829966413548. Its totient is φ = 7920839680000.

The previous prime is 20000120202091. The next prime is 20000120202107. The reversal of 20000120202100 is 120202100002.

It can be written as a sum of positive squares in 6 ways, for example, as 515541232144 + 19484578969956 = 718012^2 + 4414134^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000120202107) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 990094861 + ... + 990115060.

It is an arithmetic number, because the mean of its divisors is an integer number (1217499067043).

Almost surely, 2^{20000120202100} is an apocalyptic number.

20000120202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000120202100 is an abundant number, since it is smaller than the sum of its proper divisors (23829846211448).

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

20000120202100 is a wasteful number, since it uses less digits than its factorization.

20000120202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980210036 (or 1980210029 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20000120202100 its reverse (120202100002), we get a palindrome (20120322302102).

The spelling of 20000120202100 in words is "twenty trillion, one hundred twenty million, two hundred two thousand, one hundred".