21311230322 has 16 divisors (see below), whose sum is σ = 32099550912. Its totient is φ = 10611408720.

The previous prime is 21311230309. The next prime is 21311230331. The reversal of 21311230322 is 22303211312.

It is a junction number, because it is equal to n+sod(n) for n = 21311230294 and 21311230303.

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, 2113172 + ... + 2123232.

It is an arithmetic number, because the mean of its divisors is an integer number (2006221932).

Almost surely, 2^21311230322 is an apocalyptic number.

21311230322 is a deficient number, since it is larger than the sum of its proper divisors (10788320590).

21311230322 is a wasteful number, since it uses less digits than its factorization.

21311230322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14353.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21311230322 its reverse (22303211312), we get a palindrome (43614441634).

The spelling of 21311230322 in words is "twenty-one billion, three hundred eleven million, two hundred thirty thousand, three hundred twenty-two".