21201312322 has 16 divisors (see below), whose sum is σ = 32087502720. Its totient is φ = 10505855808.

The previous prime is 21201312311. The next prime is 21201312361. The reversal of 21201312322 is 22321310212.

It is a self number, because there is not a number n which added to its sum of digits gives 21201312322.

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, 18379 + ... + 206737.

It is an arithmetic number, because the mean of its divisors is an integer number (2005468920).

Almost surely, 2^21201312322 is an apocalyptic number.

21201312322 is a deficient number, since it is larger than the sum of its proper divisors (10886190398).

21201312322 is a wasteful number, since it uses less digits than its factorization.

21201312322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188865.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21201312322 its reverse (22321310212), we get a palindrome (43522622534).

The spelling of 21201312322 in words is "twenty-one billion, two hundred one million, three hundred twelve thousand, three hundred twenty-two".