21000012322 has 16 divisors (see below), whose sum is σ = 33039907200. Its totient is φ = 9991441152.

The previous prime is 21000012289. The next prime is 21000012323. The reversal of 21000012322 is 22321000012.

It is not an unprimeable number, because it can be changed into a prime (21000012323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1173822 + ... + 1191577.

It is an arithmetic number, because the mean of its divisors is an integer number (2064994200).

Almost surely, 2^21000012322 is an apocalyptic number.

21000012322 is a deficient number, since it is larger than the sum of its proper divisors (12039894878).

21000012322 is a wasteful number, since it uses less digits than its factorization.

21000012322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365617.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21000012322 its reverse (22321000012), we get a palindrome (43321012334).

The spelling of 21000012322 in words is "twenty-one billion, twelve thousand, three hundred twenty-two".