221110202020 has 24 divisors (see below), whose sum is σ = 464434274304. Its totient is φ = 88424490336.

The previous prime is 221110202017. The next prime is 221110202029. The reversal of 221110202020 is 20202011122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221110202029) 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, 1131684 + ... + 1312603.

It is an arithmetic number, because the mean of its divisors is an integer number (19351428096).

Almost surely, 2^221110202020 is an apocalyptic number.

221110202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221110202020 is an abundant number, since it is smaller than the sum of its proper divisors (243324072284).

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

221110202020 is a wasteful number, since it uses less digits than its factorization.

221110202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448819 (or 2448817 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221110202020 its reverse (20202011122), we get a palindrome (241312213142).

The spelling of 221110202020 in words is "two hundred twenty-one billion, one hundred ten million, two hundred two thousand, twenty".