21212110122122 has 8 divisors (see below), whose sum is σ = 31824817542336. Its totient is φ = 10603837608012.

The previous prime is 21212110122107. The next prime is 21212110122149. The reversal of 21212110122122 is 22122101121212.

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

It is a super-3 number, since 3×21212110122122³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21212110122094 and 21212110122103.

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, 1108714568 + ... + 1108733699.

It is an arithmetic number, because the mean of its divisors is an integer number (3978102192792).

Almost surely, 2^{21212110122122} is an apocalyptic number.

21212110122122 is a deficient number, since it is larger than the sum of its proper divisors (10612707420214).

21212110122122 is a wasteful number, since it uses less digits than its factorization.

21212110122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217453052.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21212110122122 its reverse (22122101121212), we get a palindrome (43334211243334).

The spelling of 21212110122122 in words is "twenty-one trillion, two hundred twelve billion, one hundred ten million, one hundred twenty-two thousand, one hundred twenty-two".