21330113032123 has 32 divisors (see below), whose sum is σ = 25228235289600. Its totient is φ = 18023218839360.

The previous prime is 21330113032121. The next prime is 21330113032141. The reversal of 21330113032123 is 32123031103312.

It is not a de Polignac number, because 21330113032123 - 2¹ = 21330113032121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21330113032121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214329711 + ... + 214429207.

It is an arithmetic number, because the mean of its divisors is an integer number (788382352800).

Almost surely, 2^{21330113032123} is an apocalyptic number.

21330113032123 is a deficient number, since it is larger than the sum of its proper divisors (3898122257477).

21330113032123 is an frugal number, since it uses more digits than its factorization.

21330113032123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108392 (or 108378 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21330113032123 its reverse (32123031103312), we get a palindrome (53453144135435).

The spelling of 21330113032123 in words is "twenty-one trillion, three hundred thirty billion, one hundred thirteen million, thirty-two thousand, one hundred twenty-three".