21002100211122 has 32 divisors (see below), whose sum is σ = 42046755194880. Its totient is φ = 6993608198160.

The previous prime is 21002100211111. The next prime is 21002100211123. The reversal of 21002100211122 is 22111200120012.

It is not an unprimeable number, because it can be changed into a prime (21002100211123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178586713 + ... + 178704275.

It is an arithmetic number, because the mean of its divisors is an integer number (1313961099840).

Almost surely, 2^{21002100211122} is an apocalyptic number.

21002100211122 is an abundant number, since it is smaller than the sum of its proper divisors (21044654983758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002100211122 is a wasteful number, since it uses less digits than its factorization.

21002100211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147478.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21002100211122 its reverse (22111200120012), we get a palindrome (43113300331134).

The spelling of 21002100211122 in words is "twenty-one trillion, two billion, one hundred million, two hundred eleven thousand, one hundred twenty-two".