221110211201020 has 48 divisors (see below), whose sum is σ = 464802363295200. Its totient is φ = 88354405601280.

The previous prime is 221110211200973. The next prime is 221110211201021. The reversal of 221110211201020 is 20102112011122.

It is a junction number, because it is equal to n+sod(n) for n = 221110211200985 and 221110211201003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110211201021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176425351 + ... + 177674209.

It is an arithmetic number, because the mean of its divisors is an integer number (9683382568650).

Almost surely, 2^{221110211201020} is an apocalyptic number.

221110211201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221110211201020 is an abundant number, since it is smaller than the sum of its proper divisors (243692152094180).

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

221110211201020 is a wasteful number, since it uses less digits than its factorization.

221110211201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257838 (or 1257836 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221110211201020 its reverse (20102112011122), we get a palindrome (241212323212142).

The spelling of 221110211201020 in words is "two hundred twenty-one trillion, one hundred ten billion, two hundred eleven million, two hundred one thousand, twenty".