21200001010 has 16 divisors (see below), whose sum is σ = 38221660800. Its totient is φ = 8466298416.

The previous prime is 21200001001. The next prime is 21200001019. The reversal of 21200001010 is 1010000212.

It is an interprime number because it is at equal distance from previous prime (21200001001) and next prime (21200001019).

It is a junction number, because it is equal to n+sod(n) for n = 21200000984 and 21200001002.

It is not an unprimeable number, because it can be changed into a prime (21200001019) 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 7 ways as a sum of consecutive naturals, for example, 1706250 + ... + 1718629.

It is an arithmetic number, because the mean of its divisors is an integer number (2388853800).

Almost surely, 2^21200001010 is an apocalyptic number.

21200001010 is a deficient number, since it is larger than the sum of its proper divisors (17021659790).

21200001010 is a wasteful number, since it uses less digits than its factorization.

21200001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3425505.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 21200001010 its reverse (1010000212), we get a palindrome (22210001222).

The spelling of 21200001010 in words is "twenty-one billion, two hundred million, one thousand, ten".