21220112202122 has 32 divisors (see below), whose sum is σ = 33739888029120. Its totient is φ = 9981460431360.

The previous prime is 21220112202077. The next prime is 21220112202287. The reversal of 21220112202122 is 22120221102212.

It is a junction number, because it is equal to n+sod(n) for n = 21220112202094 and 21220112202103.

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, 2439098 + ... + 6956250.

It is an arithmetic number, because the mean of its divisors is an integer number (1054371500910).

Almost surely, 2^{21220112202122} is an apocalyptic number.

21220112202122 is a deficient number, since it is larger than the sum of its proper divisors (12519775826998).

21220112202122 is a wasteful number, since it uses less digits than its factorization.

21220112202122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518038.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21220112202122 its reverse (22120221102212), we get a palindrome (43340333304334).

The spelling of 21220112202122 in words is "twenty-one trillion, two hundred twenty billion, one hundred twelve million, two hundred two thousand, one hundred twenty-two".