21202121011222 has 16 divisors (see below), whose sum is σ = 33528051520992. Its totient is φ = 10035607253760.

The previous prime is 21202121011189. The next prime is 21202121011241. The reversal of 21202121011222 is 22211012120212.

It is a self number, because there is not a number n which added to its sum of digits gives 21202121011222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2375849529 + ... + 2375858452.

It is an arithmetic number, because the mean of its divisors is an integer number (2095503220062).

Almost surely, 2^{21202121011222} is an apocalyptic number.

21202121011222 is a deficient number, since it is larger than the sum of its proper divisors (12325930509770).

21202121011222 is a wasteful number, since it uses less digits than its factorization.

21202121011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4751708103.

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

Adding to 21202121011222 its reverse (22211012120212), we get a palindrome (43413133131434).

The spelling of 21202121011222 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-one million, eleven thousand, two hundred twenty-two".