21312213323332 has 12 divisors (see below), whose sum is σ = 37296742714560. Its totient is φ = 10656001119176.

The previous prime is 21312213323257. The next prime is 21312213323351. The reversal of 21312213323332 is 23332331221312.

It is a junction number, because it is equal to n+sod(n) for n = 21312213323294 and 21312213323303.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25930408 + ... + 26739679.

It is an arithmetic number, because the mean of its divisors is an integer number (3108061892880).

Almost surely, 2^{21312213323332} is an apocalyptic number.

It is an amenable number.

21312213323332 is a deficient number, since it is larger than the sum of its proper divisors (15984529391228).

21312213323332 is a wasteful number, since it uses less digits than its factorization.

21312213323332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52771250 (or 52771248 counting only the distinct ones).

The product of its digits is 23328, while the sum is 31.

Adding to 21312213323332 its reverse (23332331221312), we get a palindrome (44644544544644).

The spelling of 21312213323332 in words is "twenty-one trillion, three hundred twelve billion, two hundred thirteen million, three hundred twenty-three thousand, three hundred thirty-two".