21200202001 has 24 divisors (see below), whose sum is σ = 23490425952. Its totient is φ = 19118299200.

The previous prime is 21200201989. The next prime is 21200202017. The reversal of 21200202001 is 10020200212.

It is not a de Polignac number, because 21200202001 - 2⁹ = 21200201489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200202041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8858061 + ... + 8860453.

It is an arithmetic number, because the mean of its divisors is an integer number (978767748).

Almost surely, 2^21200202001 is an apocalyptic number.

It is an amenable number.

21200202001 is a deficient number, since it is larger than the sum of its proper divisors (2290223951).

21200202001 is a wasteful number, since it uses less digits than its factorization.

21200202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2973 (or 2962 counting only the distinct ones).

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

Adding to 21200202001 its reverse (10020200212), we get a palindrome (31220402213).

The spelling of 21200202001 in words is "twenty-one billion, two hundred million, two hundred two thousand, one".