21202133202020 has 12 divisors (see below), whose sum is σ = 44524479724284. Its totient is φ = 8480853280800.

The previous prime is 21202133202013. The next prime is 21202133202053. The reversal of 21202133202020 is 2020233120212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2684275917376 + 18517857284644 = 1638376^2 + 4303238^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1060106660101 = 21202133202020 / (2 + 1 + 2 + 0 + 2 + 1 + 3 + 3 + 2 + 0 + 2 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 21202133201983 and 21202133202001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530053330031 + ... + 530053330070.

It is an arithmetic number, because the mean of its divisors is an integer number (3710373310357).

Almost surely, 2^{21202133202020} is an apocalyptic number.

21202133202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202133202020 is an abundant number, since it is smaller than the sum of its proper divisors (23322346522264).

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

21202133202020 is a wasteful number, since it uses less digits than its factorization.

21202133202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060106660110 (or 1060106660108 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21202133202020 its reverse (2020233120212), we get a palindrome (23222366322232).

The spelling of 21202133202020 in words is "twenty-one trillion, two hundred two billion, one hundred thirty-three million, two hundred two thousand, twenty".