21120032132123 has 2 divisors, whose sum is σ = 21120032132124. Its totient is φ = 21120032132122.

The previous prime is 21120032132057. The next prime is 21120032132183. The reversal of 21120032132123 is 32123123002112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21120032132123 - 2¹⁴ = 21120032115739 is a prime.

It is not a weakly prime, because it can be changed into another prime (21120032132183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560016066061 + 10560016066062.

It is an arithmetic number, because the mean of its divisors is an integer number (10560016066062).

Almost surely, 2^{21120032132123} is an apocalyptic number.

21120032132123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120032132123 is an equidigital number, since it uses as much as digits as its factorization.

21120032132123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21120032132123 its reverse (32123123002112), we get a palindrome (53243155134235).

The spelling of 21120032132123 in words is "twenty-one trillion, one hundred twenty billion, thirty-two million, one hundred thirty-two thousand, one hundred twenty-three".