21220202110122 has 64 divisors (see below), whose sum is σ = 49765504464000. Its totient is φ = 6683889809664.

The previous prime is 21220202110073. The next prime is 21220202110157. The reversal of 21220202110122 is 22101120202212.

It is a happy number.

21220202110122 is a `hidden beast` number, since 212 + 20 + 202 + 110 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21220202110095 and 21220202110104.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26185023 + ... + 26983250.

It is an arithmetic number, because the mean of its divisors is an integer number (777586007250).

Almost surely, 2^{21220202110122} is an apocalyptic number.

21220202110122 is an abundant number, since it is smaller than the sum of its proper divisors (28545302353878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21220202110122 is a wasteful number, since it uses less digits than its factorization.

21220202110122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53168692 (or 53168686 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21220202110122 its reverse (22101120202212), we get a palindrome (43321322312334).

The spelling of 21220202110122 in words is "twenty-one trillion, two hundred twenty billion, two hundred two million, one hundred ten thousand, one hundred twenty-two".