21002020200200 has 48 divisors (see below), whose sum is σ = 52585827507780. Its totient is φ = 7754592072960.

The previous prime is 21002020200151. The next prime is 21002020200209. The reversal of 21002020200200 is 200202020012.

It can be written as a sum of positive squares in 6 ways, for example, as 5287249557604 + 15714770642596 = 2299402^2 + 3964186^2 .

It is not an unprimeable number, because it can be changed into a prime (21002020200209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4038847439 + ... + 4038852638.

Almost surely, 2^{21002020200200} is an apocalyptic number.

21002020200200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002020200200 is an abundant number, since it is smaller than the sum of its proper divisors (31583807307580).

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

21002020200200 is a wasteful number, since it uses less digits than its factorization.

21002020200200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8077700106 (or 8077700097 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 21002020200200 its reverse (200202020012), we get a palindrome (21202222220212).

The spelling of 21002020200200 in words is "twenty-one trillion, two billion, twenty million, two hundred thousand, two hundred".