21110122122202 has 4 divisors (see below), whose sum is σ = 31665183183306. Its totient is φ = 10555061061100.

The previous prime is 21110122122179. The next prime is 21110122122223. The reversal of 21110122122202 is 20222122101112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15577695965881 + 5532426156321 = 3946859^2 + 2352111^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21110122122202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5277530530549 + ... + 5277530530552.

Almost surely, 2^{21110122122202} is an apocalyptic number.

21110122122202 is a deficient number, since it is larger than the sum of its proper divisors (10555061061104).

21110122122202 is a wasteful number, since it uses less digits than its factorization.

21110122122202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10555061061103.

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

Adding to 21110122122202 its reverse (20222122101112), we get a palindrome (41332244223314).

The spelling of 21110122122202 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred two".