21312111030030 has 48 divisors (see below), whose sum is σ = 55413848215440. Its totient is φ = 5682987604224.

The previous prime is 21312111030019. The next prime is 21312111030031. The reversal of 21312111030030 is 3003011121312.

21312111030030 is a `hidden beast` number, since 2 + 1 + 312 + 11 + 10 + 300 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21312111029985 and 21312111030012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312111030031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2911467 + ... + 7148486.

It is an arithmetic number, because the mean of its divisors is an integer number (1154455171155).

Almost surely, 2^{21312111030030} is an apocalyptic number.

21312111030030 is an abundant number, since it is smaller than the sum of its proper divisors (34101737185410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21312111030030 is a wasteful number, since it uses less digits than its factorization.

21312111030030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10083505 (or 10083502 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21312111030030 its reverse (3003011121312), we get a palindrome (24315122151342).

The spelling of 21312111030030 in words is "twenty-one trillion, three hundred twelve billion, one hundred eleven million, thirty thousand, thirty".