21112220002220 has 48 divisors (see below), whose sum is σ = 45361751984640. Its totient is φ = 8250099259584.

The previous prime is 21112220002151. The next prime is 21112220002243. The reversal of 21112220002220 is 2220002221112.

It is a happy number.

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, 20015810 + ... + 21044169.

It is an arithmetic number, because the mean of its divisors is an integer number (945036499680).

Almost surely, 2^{21112220002220} is an apocalyptic number.

21112220002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112220002220 is an abundant number, since it is smaller than the sum of its proper divisors (24249531982420).

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

21112220002220 is a wasteful number, since it uses less digits than its factorization.

21112220002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41060582 (or 41060580 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21112220002220 its reverse (2220002221112), we get a palindrome (23332222223332).

The spelling of 21112220002220 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty million, two thousand, two hundred twenty".