21011001122202 has 128 divisors (see below), whose sum is σ = 51981983563776. Its totient is φ = 5513257032192.

The previous prime is 21011001122173. The next prime is 21011001122207. The reversal of 21011001122202 is 20222110011012.

It is not an unprimeable number, because it can be changed into a prime (21011001122207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 209738958 + ... + 209839110.

It is an arithmetic number, because the mean of its divisors is an integer number (406109246592).

Almost surely, 2^{21011001122202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21011001122202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25990991781888).

21011001122202 is an abundant number, since it is smaller than the sum of its proper divisors (30970982441574).

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

21011001122202 is a wasteful number, since it uses less digits than its factorization.

21011001122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102124.

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

Adding to 21011001122202 its reverse (20222110011012), we get a palindrome (41233111133214).

The spelling of 21011001122202 in words is "twenty-one trillion, eleven billion, one million, one hundred twenty-two thousand, two hundred two".