201110221020 has 96 divisors (see below), whose sum is σ = 565074397440. Its totient is φ = 53442385920.

The previous prime is 201110221001. The next prime is 201110221021. The reversal of 201110221020 is 20122011102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 201110220987 and 201110221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201110221021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56315835 + ... + 56319405.

It is an arithmetic number, because the mean of its divisors is an integer number (5886191640).

Almost surely, 2^201110221020 is an apocalyptic number.

201110221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201110221020 is an abundant number, since it is smaller than the sum of its proper divisors (363964176420).

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

201110221020 is a wasteful number, since it uses less digits than its factorization.

201110221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6595 (or 6593 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201110221020 its reverse (20122011102), we get a palindrome (221232232122).

The spelling of 201110221020 in words is "two hundred one billion, one hundred ten million, two hundred twenty-one thousand, twenty".