21030331202 has 16 divisors (see below), whose sum is σ = 33406120440. Its totient is φ = 9895143168.

The previous prime is 21030331181. The next prime is 21030331207. The reversal of 21030331202 is 20213303012.

It can be written as a sum of positive squares in 4 ways, for example, as 20808351001 + 221980201 = 144251^2 + 14899^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (21030331207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203324 + ... + 288792.

Almost surely, 2^21030331202 is an apocalyptic number.

21030331202 is a deficient number, since it is larger than the sum of its proper divisors (12375789238).

21030331202 is a wasteful number, since it uses less digits than its factorization.

21030331202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92725.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21030331202 its reverse (20213303012), we get a palindrome (41243634214).

The spelling of 21030331202 in words is "twenty-one billion, thirty million, three hundred thirty-one thousand, two hundred two".