21200222220122 has 16 divisors (see below), whose sum is σ = 35209052916192. Its totient is φ = 9492636814320.

The previous prime is 21200222220103. The next prime is 21200222220181. The reversal of 21200222220122 is 22102222200212.

It is a junction number, because it is equal to n+sod(n) for n = 21200222220094 and 21200222220103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7191390053 + ... + 7191393000.

It is an arithmetic number, because the mean of its divisors is an integer number (2200565807262).

Almost surely, 2^{21200222220122} is an apocalyptic number.

21200222220122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21200222220122 is a deficient number, since it is larger than the sum of its proper divisors (14008830696070).

21200222220122 is a wasteful number, since it uses less digits than its factorization.

21200222220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14382783133.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21200222220122 its reverse (22102222200212), we get a palindrome (43302444420334).

The spelling of 21200222220122 in words is "twenty-one trillion, two hundred billion, two hundred twenty-two million, two hundred twenty thousand, one hundred twenty-two".