21001122102122 has 8 divisors (see below), whose sum is σ = 31710303571872. Its totient is φ = 10431020911500.

The previous prime is 21001122102073. The next prime is 21001122102127. The reversal of 21001122102122 is 22120122110012.

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 21001122102122.

It is not an unprimeable number, because it can be changed into a prime (21001122102127) 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 3 ways as a sum of consecutive naturals, for example, 34770069404 + ... + 34770070007.

It is an arithmetic number, because the mean of its divisors is an integer number (3963787946484).

Almost surely, 2^{21001122102122} is an apocalyptic number.

21001122102122 is a deficient number, since it is larger than the sum of its proper divisors (10709181469750).

21001122102122 is a wasteful number, since it uses less digits than its factorization.

21001122102122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69540139564.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21001122102122 its reverse (22120122110012), we get a palindrome (43121244212134).

The spelling of 21001122102122 in words is "twenty-one trillion, one billion, one hundred twenty-two million, one hundred two thousand, one hundred twenty-two".