21202011001222 has 48 divisors (see below), whose sum is σ = 32780963847456. Its totient is φ = 10284331366400.

The previous prime is 21202011001177. The next prime is 21202011001277. The reversal of 21202011001222 is 22210011020212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21202011001196 and 21202011001205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1378267743 + ... + 1378283125.

It is an arithmetic number, because the mean of its divisors is an integer number (682936746822).

Almost surely, 2^{21202011001222} is an apocalyptic number.

21202011001222 is a deficient number, since it is larger than the sum of its proper divisors (11578952846234).

21202011001222 is a wasteful number, since it uses less digits than its factorization.

21202011001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17745 (or 17704 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202011001222 its reverse (22210011020212), we get a palindrome (43412022021434).

The spelling of 21202011001222 in words is "twenty-one trillion, two hundred two billion, eleven million, one thousand, two hundred twenty-two".