21302213012 has 24 divisors (see below), whose sum is σ = 37820724480. Its totient is φ = 10497072960.

The previous prime is 21302212993. The next prime is 21302213057. The reversal of 21302213012 is 21031220312.

It is a super-2 number, since 2×21302213012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11837 + ... + 206747.

It is an arithmetic number, because the mean of its divisors is an integer number (1575863520).

Almost surely, 2^21302213012 is an apocalyptic number.

It is an amenable number.

21302213012 is a deficient number, since it is larger than the sum of its proper divisors (16518511468).

21302213012 is a wasteful number, since it uses less digits than its factorization.

21302213012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195311 (or 195309 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21302213012 its reverse (21031220312), we get a palindrome (42333433324).

The spelling of 21302213012 in words is "twenty-one billion, three hundred two million, two hundred thirteen thousand, twelve".