221112020122020 has 72 divisors (see below), whose sum is σ = 672822254462904. Its totient is φ = 58777201548288.

The previous prime is 221112020122001. The next prime is 221112020122027. The reversal of 221112020122020 is 20221020211122.

It is a happy number.

221112020122020 is a `hidden beast` number, since 2 + 211 + 12 + 0 + 201 + 220 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 21103806956544 + 200008213165476 = 4593888^2 + 14142426^2 .

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 = 221112020121984 and 221112020122002.

It is not an unprimeable number, because it can be changed into a prime (221112020122027) by changing a digit.

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, 1937482549 + ... + 1937596668.

It is an arithmetic number, because the mean of its divisors is an integer number (9344753534207).

Almost surely, 2^{221112020122020} is an apocalyptic number.

221112020122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112020122020 is an abundant number, since it is smaller than the sum of its proper divisors (451710234340884).

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

221112020122020 is a wasteful number, since it uses less digits than its factorization.

221112020122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875079549 (or 3875079544 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221112020122020 its reverse (20221020211122), we get a palindrome (241333040333142).

The spelling of 221112020122020 in words is "two hundred twenty-one trillion, one hundred twelve billion, twenty million, one hundred twenty-two thousand, twenty".