21220220222010 has 48 divisors (see below), whose sum is σ = 55207426120704. Its totient is φ = 5655150670176.

The previous prime is 21220220221961. The next prime is 21220220222023. The reversal of 21220220222010 is 1022202202212.

21220220222010 is a `hidden beast` number, since 2 + 1 + 220 + 220 + 2 + 220 + 1 + 0 = 666.

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

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 74330122 + ... + 74615061.

It is an arithmetic number, because the mean of its divisors is an integer number (1150154710848).

Almost surely, 2^{21220220222010} is an apocalyptic number.

21220220222010 is an abundant number, since it is smaller than the sum of its proper divisors (33987205898694).

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

21220220222010 is a wasteful number, since it uses less digits than its factorization.

21220220222010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148946779 (or 148946776 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21220220222010 its reverse (1022202202212), we get a palindrome (22242422424222).

The spelling of 21220220222010 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty million, two hundred twenty-two thousand, ten".