21123110113030 has 8 divisors (see below), whose sum is σ = 38021598203472. Its totient is φ = 8449244045208.

The previous prime is 21123110112971. The next prime is 21123110113043. The reversal of 21123110113030 is 3031101132112.

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 = 21123110112989 and 21123110113007.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1056155505642 + ... + 1056155505661.

It is an arithmetic number, because the mean of its divisors is an integer number (4752699775434).

Almost surely, 2^{21123110113030} is an apocalyptic number.

21123110113030 is a deficient number, since it is larger than the sum of its proper divisors (16898488090442).

21123110113030 is a wasteful number, since it uses less digits than its factorization.

21123110113030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112311011310.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21123110113030 its reverse (3031101132112), we get a palindrome (24154211245142).

The spelling of 21123110113030 in words is "twenty-one trillion, one hundred twenty-three billion, one hundred ten million, one hundred thirteen thousand, thirty".