21220200102220 has 24 divisors (see below), whose sum is σ = 50928480245664. Its totient is φ = 7275497177856.

The previous prime is 21220200102193. The next prime is 21220200102253. The reversal of 21220200102220 is 2220100202212.

It is a junction number, because it is equal to n+sod(n) for n = 21220200102194 and 21220200102203.

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, 75786428797 + ... + 75786429076.

It is an arithmetic number, because the mean of its divisors is an integer number (2122020010236).

Almost surely, 2^{21220200102220} is an apocalyptic number.

21220200102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220200102220 is an abundant number, since it is smaller than the sum of its proper divisors (29708280143444).

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

21220200102220 is a wasteful number, since it uses less digits than its factorization.

21220200102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151572857889 (or 151572857887 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21220200102220 its reverse (2220100202212), we get a palindrome (23440300304432).

The spelling of 21220200102220 in words is "twenty-one trillion, two hundred twenty billion, two hundred million, one hundred two thousand, two hundred twenty".