21120020101222 has 16 divisors (see below), whose sum is σ = 36205820370720. Its totient is φ = 9051419279808.

The previous prime is 21120020101171. The next prime is 21120020101223. The reversal of 21120020101222 is 22210102002112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21120020101196 and 21120020101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120020101223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7857354 + ... + 10196962.

It is an arithmetic number, because the mean of its divisors is an integer number (2262863773170).

Almost surely, 2^{21120020101222} is an apocalyptic number.

21120020101222 is a deficient number, since it is larger than the sum of its proper divisors (15085800269498).

21120020101222 is a wasteful number, since it uses less digits than its factorization.

21120020101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2984415.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21120020101222 its reverse (22210102002112), we get a palindrome (43330122103334).

The spelling of 21120020101222 in words is "twenty-one trillion, one hundred twenty billion, twenty million, one hundred one thousand, two hundred twenty-two".