221011020011020 has 48 divisors (see below), whose sum is σ = 466771037031936. Its totient is φ = 87900479456000.

The previous prime is 221011020010987. The next prime is 221011020011029. The reversal of 221011020011020 is 20110020110122.

It is a super-2 number, since 2×221011020011020² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221011020011029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5332891 + ... + 21690130.

It is an arithmetic number, because the mean of its divisors is an integer number (9724396604832).

Almost surely, 2^{221011020011020} is an apocalyptic number.

221011020011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221011020011020 is an abundant number, since it is smaller than the sum of its proper divisors (245760017020916).

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

221011020011020 is a wasteful number, since it uses less digits than its factorization.

221011020011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27025362 (or 27025360 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221011020011020 its reverse (20110020110122), we get a palindrome (241121040121142).

The spelling of 221011020011020 in words is "two hundred twenty-one trillion, eleven billion, twenty million, eleven thousand, twenty".