21312100030030 has 8 divisors (see below), whose sum is σ = 38361780054072. Its totient is φ = 8524840012008.

The previous prime is 21312100030027. The next prime is 21312100030061. The reversal of 21312100030030 is 3003000121312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21312100029986 and 21312100030013.

It is a congruent number.

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, 1065605001492 + ... + 1065605001511.

It is an arithmetic number, because the mean of its divisors is an integer number (4795222506759).

Almost surely, 2^{21312100030030} is an apocalyptic number.

21312100030030 is a deficient number, since it is larger than the sum of its proper divisors (17049680024042).

21312100030030 is a wasteful number, since it uses less digits than its factorization.

21312100030030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131210003010.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21312100030030 its reverse (3003000121312), we get a palindrome (24315100151342).

The spelling of 21312100030030 in words is "twenty-one trillion, three hundred twelve billion, one hundred million, thirty thousand, thirty".