21030323101123 has 16 divisors (see below), whose sum is σ = 24255521357760. Its totient is φ = 17860346418816.

The previous prime is 21030323101013. The next prime is 21030323101157. The reversal of 21030323101123 is 32110132303012.

It is a cyclic number.

It is not a de Polignac number, because 21030323101123 - 2¹³ = 21030323092931 is a prime.

It is a super-2 number, since 2×21030323101123² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21030323101094 and 21030323101103.

It is not an unprimeable number, because it can be changed into a prime (21030323104123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63252465 + ... + 63584077.

It is an arithmetic number, because the mean of its divisors is an integer number (1515970084860).

Almost surely, 2^{21030323101123} is an apocalyptic number.

21030323101123 is a deficient number, since it is larger than the sum of its proper divisors (3225198256637).

21030323101123 is a wasteful number, since it uses less digits than its factorization.

21030323101123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414846.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21030323101123 its reverse (32110132303012), we get a palindrome (53140455404135).

The spelling of 21030323101123 in words is "twenty-one trillion, thirty billion, three hundred twenty-three million, one hundred one thousand, one hundred twenty-three".