21202201312 has 24 divisors (see below), whose sum is σ = 41779747296. Its totient is φ = 10591471872.

The previous prime is 21202201303. The next prime is 21202201313. The reversal of 21202201312 is 21310220212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202201313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265053 + ... + 335644.

It is an arithmetic number, because the mean of its divisors is an integer number (1740822804).

Almost surely, 2^21202201312 is an apocalyptic number.

It is an amenable number.

21202201312 is a deficient number, since it is larger than the sum of its proper divisors (20577545984).

21202201312 is a wasteful number, since it uses less digits than its factorization.

21202201312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601810 (or 601802 counting only the distinct ones).

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

Adding to 21202201312 its reverse (21310220212), we get a palindrome (42512421524).

The spelling of 21202201312 in words is "twenty-one billion, two hundred two million, two hundred one thousand, three hundred twelve".