21102302212 has 12 divisors (see below), whose sum is σ = 37009839580. Its totient is φ = 10528062336.

The previous prime is 21102302183. The next prime is 21102302213. The reversal of 21102302212 is 21220320112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18589686336 + 2512615876 = 136344^2 + 50126^2 .

It is not an unprimeable number, because it can be changed into a prime (21102302213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5770137 + ... + 5773792.

Almost surely, 2^21102302212 is an apocalyptic number.

It is an amenable number.

21102302212 is a deficient number, since it is larger than the sum of its proper divisors (15907537368).

21102302212 is a wasteful number, since it uses less digits than its factorization.

21102302212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11544390 (or 11544388 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21102302212 its reverse (21220320112), we get a palindrome (42322622324).

The spelling of 21102302212 in words is "twenty-one billion, one hundred two million, three hundred two thousand, two hundred twelve".