221102020220 has 12 divisors (see below), whose sum is σ = 464314242504. Its totient is φ = 88440808080.

The previous prime is 221102020201. The next prime is 221102020229. The reversal of 221102020220 is 22020201122.

221102020220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221102020220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221102020195 and 221102020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102020229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5527550486 + ... + 5527550525.

It is an arithmetic number, because the mean of its divisors is an integer number (38692853542).

Almost surely, 2^221102020220 is an apocalyptic number.

221102020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221102020220 is an abundant number, since it is smaller than the sum of its proper divisors (243212222284).

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

221102020220 is a wasteful number, since it uses less digits than its factorization.

221102020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11055101020 (or 11055101018 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221102020220 its reverse (22020201122), we get a palindrome (243122221342).

The spelling of 221102020220 in words is "two hundred twenty-one billion, one hundred two million, twenty thousand, two hundred twenty".