21220331203 has 32 divisors (see below), whose sum is σ = 23487528960. Its totient is φ = 19095484320.

The previous prime is 21220331179. The next prime is 21220331227. The reversal of 21220331203 is 30213302212.

It is an interprime number because it is at equal distance from previous prime (21220331179) and next prime (21220331227).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21220331203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220331303) 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 31 ways as a sum of consecutive naturals, for example, 7967250 + ... + 7969912.

It is an arithmetic number, because the mean of its divisors is an integer number (733985280).

Almost surely, 2^21220331203 is an apocalyptic number.

21220331203 is a deficient number, since it is larger than the sum of its proper divisors (2267197757).

21220331203 is a wasteful number, since it uses less digits than its factorization.

21220331203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2959.

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

Adding to 21220331203 its reverse (30213302212), we get a palindrome (51433633415).

The spelling of 21220331203 in words is "twenty-one billion, two hundred twenty million, three hundred thirty-one thousand, two hundred three".