21002201111122 has 128 divisors (see below), whose sum is σ = 42280832563200. Its totient is φ = 7585984627200.

The previous prime is 21002201111081. The next prime is 21002201111153. The reversal of 21002201111122 is 22111110220012.

It is a junction number, because it is equal to n+sod(n) for n = 21002201111096 and 21002201111105.

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 63 ways as a sum of consecutive naturals, for example, 10403422 + ... + 12257062.

It is an arithmetic number, because the mean of its divisors is an integer number (330319004400).

Almost surely, 2^{21002201111122} is an apocalyptic number.

21002201111122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21002201111122 is an abundant number, since it is smaller than the sum of its proper divisors (21278631452078).

21002201111122 is a wasteful number, since it uses less digits than its factorization.

21002201111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853792.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21002201111122 its reverse (22111110220012), we get a palindrome (43113311331134).

The spelling of 21002201111122 in words is "twenty-one trillion, two billion, two hundred one million, one hundred eleven thousand, one hundred twenty-two".