21202332312 has 32 divisors (see below), whose sum is σ = 60578092800. Its totient is φ = 6057809184.

The previous prime is 21202332299. The next prime is 21202332367. The reversal of 21202332312 is 21323320212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 63102012 + ... + 63102347.

It is an arithmetic number, because the mean of its divisors is an integer number (1893065400).

Almost surely, 2^21202332312 is an apocalyptic number.

It is an amenable number.

21202332312 is an abundant number, since it is smaller than the sum of its proper divisors (39375760488).

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

21202332312 is a wasteful number, since it uses less digits than its factorization.

21202332312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126204375 (or 126204371 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21202332312 its reverse (21323320212), we get a palindrome (42525652524).

The spelling of 21202332312 in words is "twenty-one billion, two hundred two million, three hundred thirty-two thousand, three hundred twelve".