21120202112122 has 32 divisors (see below), whose sum is σ = 32783264089344. Its totient is φ = 10199135856000.

The previous prime is 21120202112117. The next prime is 21120202112161. The reversal of 21120202112122 is 22121120202112.

It is a self number, because there is not a number n which added to its sum of digits gives 21120202112122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2700622 + ... + 7038022.

It is an arithmetic number, because the mean of its divisors is an integer number (1024477002792).

Almost surely, 2^{21120202112122} is an apocalyptic number.

21120202112122 is a deficient number, since it is larger than the sum of its proper divisors (11663061977222).

21120202112122 is a wasteful number, since it uses less digits than its factorization.

21120202112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4338174.

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

Adding to 21120202112122 its reverse (22121120202112), we get a palindrome (43241322314234).

The spelling of 21120202112122 in words is "twenty-one trillion, one hundred twenty billion, two hundred two million, one hundred twelve thousand, one hundred twenty-two".