21330341312123 has 16 divisors (see below), whose sum is σ = 21437386490880. Its totient is φ = 21223607834016.

The previous prime is 21330341312101. The next prime is 21330341312131. The reversal of 21330341312123 is 32121314303312.

It is a cyclic number.

It is not a de Polignac number, because 21330341312123 - 2⁴⁰ = 20230829684347 is a prime.

It is a super-2 number, since 2×21330341312123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21330341312723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377212790 + ... + 377269332.

It is an arithmetic number, because the mean of its divisors is an integer number (1339836655680).

Almost surely, 2^{21330341312123} is an apocalyptic number.

21330341312123 is a deficient number, since it is larger than the sum of its proper divisors (107045178757).

21330341312123 is a wasteful number, since it uses less digits than its factorization.

21330341312123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59266.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 21330341312123 its reverse (32121314303312), we get a palindrome (53451655615435).

The spelling of 21330341312123 in words is "twenty-one trillion, three hundred thirty billion, three hundred forty-one million, three hundred twelve thousand, one hundred twenty-three".