20102220221220 has 96 divisors (see below), whose sum is σ = 62543655767040. Its totient is φ = 5360299338240.

The previous prime is 20102220221207. The next prime is 20102220221261. The reversal of 20102220221220 is 2212202220102.

20102220221220 is a `hidden beast` number, since 2 + 0 + 1 + 0 + 2 + 220 + 221 + 220 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 20102220221193 and 20102220221202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8972589 + ... + 10986891.

It is an arithmetic number, because the mean of its divisors is an integer number (651496414240).

Almost surely, 2^{20102220221220} is an apocalyptic number.

20102220221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102220221220 is an abundant number, since it is smaller than the sum of its proper divisors (42441435545820).

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

20102220221220 is a wasteful number, since it uses less digits than its factorization.

20102220221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032802 (or 2032794 counting only the distinct ones).

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

Adding to 20102220221220 its reverse (2212202220102), we get a palindrome (22314422441322).

The spelling of 20102220221220 in words is "twenty trillion, one hundred two billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty".