21203332210 has 32 divisors (see below), whose sum is σ = 38841232752. Its totient is φ = 8331636480.

The previous prime is 21203332159. The next prime is 21203332211. The reversal of 21203332210 is 1223330212.

It can be written as a sum of positive squares in 8 ways, for example, as 5623050169 + 15580282041 = 74987^2 + 124821^2 .

It is not an unprimeable number, because it can be changed into a prime (21203332211) 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 15 ways as a sum of consecutive naturals, for example, 464364 + ... + 507976.

Almost surely, 2^21203332210 is an apocalyptic number.

21203332210 is a deficient number, since it is larger than the sum of its proper divisors (17637900542).

21203332210 is a wasteful number, since it uses less digits than its factorization.

21203332210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44478.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21203332210 its reverse (1223330212), we get a palindrome (22426662422).

The spelling of 21203332210 in words is "twenty-one billion, two hundred three million, three hundred thirty-two thousand, two hundred ten".