21202121211202 has 8 divisors (see below), whose sum is σ = 31803329166912. Its totient is φ = 10601011488900.

The previous prime is 21202121211197. The next prime is 21202121211211. The reversal of 21202121211202 is 20211212120212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21202121211202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24016374 + ... + 24883537.

It is an arithmetic number, because the mean of its divisors is an integer number (3975416145864).

Almost surely, 2^{21202121211202} is an apocalyptic number.

21202121211202 is a deficient number, since it is larger than the sum of its proper divisors (10601207955710).

21202121211202 is a wasteful number, since it uses less digits than its factorization.

21202121211202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49116704.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21202121211202 its reverse (20211212120212), we get a palindrome (41413333331414).

The spelling of 21202121211202 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred two".