21212122100122 has 8 divisors (see below), whose sum is σ = 31822573703616. Its totient is φ = 10604597532252.

The previous prime is 21212122100111. The next prime is 21212122100123. The reversal of 21212122100122 is 22100122121212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21212122100122.

It is not an unprimeable number, because it can be changed into a prime (21212122100123) 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 in 3 ways as a sum of consecutive naturals, for example, 731740788 + ... + 731769775.

It is an arithmetic number, because the mean of its divisors is an integer number (3977821712952).

Almost surely, 2^{21212122100122} is an apocalyptic number.

21212122100122 is a deficient number, since it is larger than the sum of its proper divisors (10610451603494).

21212122100122 is a wasteful number, since it uses less digits than its factorization.

21212122100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463517812.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21212122100122 its reverse (22100122121212), we get a palindrome (43312244221334).

The spelling of 21212122100122 in words is "twenty-one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred thousand, one hundred twenty-two".