21312112211330 has 32 divisors (see below), whose sum is σ = 41306825681280. Its totient is φ = 7887393867520.

The previous prime is 21312112211329. The next prime is 21312112211387. The reversal of 21312112211330 is 3311221121312.

It is a happy number.

It is a super-2 number, since 2×21312112211330² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21312112211296 and 21312112211305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1062408326 + ... + 1062428385.

It is an arithmetic number, because the mean of its divisors is an integer number (1290838302540).

Almost surely, 2^{21312112211330} is an apocalyptic number.

21312112211330 is a deficient number, since it is larger than the sum of its proper divisors (19994713469950).

21312112211330 is a wasteful number, since it uses less digits than its factorization.

21312112211330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124836794.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21312112211330 its reverse (3311221121312), we get a palindrome (24623333332642).

The spelling of 21312112211330 in words is "twenty-one trillion, three hundred twelve billion, one hundred twelve million, two hundred eleven thousand, three hundred thirty".