21102001121222 has 16 divisors (see below), whose sum is σ = 36209946246912. Its totient is φ = 9034942970760.

The previous prime is 21102001121213. The next prime is 21102001121323. The reversal of 21102001121222 is 22212110020112.

It is a self number, because there is not a number n which added to its sum of digits gives 21102001121222.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 730968008 + ... + 730996875.

It is an arithmetic number, because the mean of its divisors is an integer number (2263121640432).

Almost surely, 2^{21102001121222} is an apocalyptic number.

21102001121222 is a deficient number, since it is larger than the sum of its proper divisors (15107945125690).

21102001121222 is a wasteful number, since it uses less digits than its factorization.

21102001121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461965923.

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

Adding to 21102001121222 its reverse (22212110020112), we get a palindrome (43314111141334).

The spelling of 21102001121222 in words is "twenty-one trillion, one hundred two billion, one million, one hundred twenty-one thousand, two hundred twenty-two".