221102102001020 has 24 divisors (see below), whose sum is σ = 491627026803024. Its totient is φ = 83238438400256.

The previous prime is 221102102001019. The next prime is 221102102001029. The reversal of 221102102001020 is 20100201201122.

It is a super-2 number, since 2×221102102001020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221102102000986 and 221102102001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102102001029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325150149662 + ... + 325150150341.

It is an arithmetic number, because the mean of its divisors is an integer number (20484459450126).

Almost surely, 2^{221102102001020} is an apocalyptic number.

221102102001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221102102001020 is an abundant number, since it is smaller than the sum of its proper divisors (270524924802004).

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

221102102001020 is a wasteful number, since it uses less digits than its factorization.

221102102001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650300300029 (or 650300300027 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221102102001020 its reverse (20100201201122), we get a palindrome (241202303202142).

The spelling of 221102102001020 in words is "two hundred twenty-one trillion, one hundred two billion, one hundred two million, one thousand, twenty".