21112122122122 has 8 divisors (see below), whose sum is σ = 32049727559136. Its totient is φ = 10428879602412.

The previous prime is 21112122122051. The next prime is 21112122122131. The reversal of 21112122122122 is 22122122121112.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21112122122093 and 21112122122102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63590729118 + ... + 63590729449.

It is an arithmetic number, because the mean of its divisors is an integer number (4006215944892).

Almost surely, 2^{21112122122122} is an apocalyptic number.

21112122122122 is a deficient number, since it is larger than the sum of its proper divisors (10937605437014).

21112122122122 is a wasteful number, since it uses less digits than its factorization.

21112122122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127181458652.

The product of its digits is 256, while the sum is 22.

Adding to 21112122122122 its reverse (22122122121112), we get a palindrome (43234244243234).

The spelling of 21112122122122 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred twenty-two".