21302234412 has 48 divisors (see below), whose sum is σ = 51816705024. Its totient is φ = 6803640000.

The previous prime is 21302234347. The next prime is 21302234417. The reversal of 21302234412 is 21443220312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21302234417) 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, 245914 + ... + 321057.

It is an arithmetic number, because the mean of its divisors is an integer number (1079514688).

Almost surely, 2^21302234412 is an apocalyptic number.

It is an amenable number.

21302234412 is an abundant number, since it is smaller than the sum of its proper divisors (30514470612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21302234412 is a wasteful number, since it uses less digits than its factorization.

21302234412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567110 (or 567108 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21302234412 its reverse (21443220312), we get a palindrome (42745454724).

The spelling of 21302234412 in words is "twenty-one billion, three hundred two million, two hundred thirty-four thousand, four hundred twelve".