21312211030 has 32 divisors (see below), whose sum is σ = 42000573600. Its totient is φ = 7721905920.

The previous prime is 21312211027. The next prime is 21312211031. The reversal of 21312211030 is 3011221312.

It is a junction number, because it is equal to n+sod(n) for n = 21312210995 and 21312211013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312211031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319255 + ... + 380194.

It is an arithmetic number, because the mean of its divisors is an integer number (1312517925).

Almost surely, 2^21312211030 is an apocalyptic number.

21312211030 is a deficient number, since it is larger than the sum of its proper divisors (20688362570).

21312211030 is a wasteful number, since it uses less digits than its factorization.

21312211030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699744.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21312211030 its reverse (3011221312), we get a palindrome (24323432342).

The spelling of 21312211030 in words is "twenty-one billion, three hundred twelve million, two hundred eleven thousand, thirty".