21322012122123 has 8 divisors (see below), whose sum is σ = 28636862996688. Its totient is φ = 14110917997824.

The previous prime is 21322012122121. The next prime is 21322012122143. The reversal of 21322012122123 is 32122121022312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21322012122123 - 2¹ = 21322012122121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21322012122093 and 21322012122102.

It is not an unprimeable number, because it can be changed into a prime (21322012122121) 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 in 7 ways as a sum of consecutive naturals, for example, 25939187086 + ... + 25939187907.

It is an arithmetic number, because the mean of its divisors is an integer number (3579607874586).

Almost surely, 2^{21322012122123} is an apocalyptic number.

21322012122123 is a deficient number, since it is larger than the sum of its proper divisors (7314850874565).

21322012122123 is a wasteful number, since it uses less digits than its factorization.

21322012122123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51878375133.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21322012122123 its reverse (32122121022312), we get a palindrome (53444133144435).

The spelling of 21322012122123 in words is "twenty-one trillion, three hundred twenty-two billion, twelve million, one hundred twenty-two thousand, one hundred twenty-three".