21322121120123 has 2 divisors, whose sum is σ = 21322121120124. Its totient is φ = 21322121120122.

The previous prime is 21322121120101. The next prime is 21322121120129. The reversal of 21322121120123 is 32102112122312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21322121120123 - 2⁴² = 16924074609019 is a prime.

It is a super-2 number, since 2×21322121120123² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21322121120129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661060560061 + 10661060560062.

It is an arithmetic number, because the mean of its divisors is an integer number (10661060560062).

Almost surely, 2^{21322121120123} is an apocalyptic number.

21322121120123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322121120123 is an equidigital number, since it uses as much as digits as its factorization.

21322121120123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21322121120123 its reverse (32102112122312), we get a palindrome (53424233242435).

The spelling of 21322121120123 in words is "twenty-one trillion, three hundred twenty-two billion, one hundred twenty-one million, one hundred twenty thousand, one hundred twenty-three".