21312303221030 has 16 divisors (see below), whose sum is σ = 38425976334144. Its totient is φ = 8510736724800.

The previous prime is 21312303221023. The next prime is 21312303221087. The reversal of 21312303221030 is 3012230321312.

It is a junction number, because it is equal to n+sod(n) for n = 21312303220987 and 21312303221005.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1773064142 + ... + 1773076161.

It is an arithmetic number, because the mean of its divisors is an integer number (2401623520884).

Almost surely, 2^{21312303221030} is an apocalyptic number.

21312303221030 is a deficient number, since it is larger than the sum of its proper divisors (17113673113114).

21312303221030 is a wasteful number, since it uses less digits than its factorization.

21312303221030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546140911.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21312303221030 its reverse (3012230321312), we get a palindrome (24324533542342).

The spelling of 21312303221030 in words is "twenty-one trillion, three hundred twelve billion, three hundred three million, two hundred twenty-one thousand, thirty".