21111002332123 has 4 divisors (see below), whose sum is σ = 23030184362328. Its totient is φ = 19191820301920.

The previous prime is 21111002332117. The next prime is 21111002332127. The reversal of 21111002332123 is 32123320011112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21111002332123 - 2²¹ = 21111000234971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21111002332094 and 21111002332103.

It is not an unprimeable number, because it can be changed into a prime (21111002332127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 959591015086 + ... + 959591015107.

It is an arithmetic number, because the mean of its divisors is an integer number (5757546090582).

Almost surely, 2^{21111002332123} is an apocalyptic number.

21111002332123 is a deficient number, since it is larger than the sum of its proper divisors (1919182030205).

21111002332123 is a wasteful number, since it uses less digits than its factorization.

21111002332123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919182030204.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21111002332123 its reverse (32123320011112), we get a palindrome (53234322343235).

The spelling of 21111002332123 in words is "twenty-one trillion, one hundred eleven billion, two million, three hundred thirty-two thousand, one hundred twenty-three".