21112121010122 has 8 divisors (see below), whose sum is σ = 31668360744036. Its totient is φ = 10556000762112.

The previous prime is 21112121010107. The next prime is 21112121010139. The reversal of 21112121010122 is 22101012121112.

It can be written as a sum of positive squares in 2 ways, for example, as 20320432136761 + 791688873361 = 4507819^2 + 889769^2 .

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 21112121010122.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 29428433 + ... + 30137300.

Almost surely, 2^{21112121010122} is an apocalyptic number.

21112121010122 is a deficient number, since it is larger than the sum of its proper divisors (10556239733914).

21112121010122 is a wasteful number, since it uses less digits than its factorization.

21112121010122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59742952.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112121010122 its reverse (22101012121112), we get a palindrome (43213133131234).

The spelling of 21112121010122 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-one million, ten thousand, one hundred twenty-two".