221102110212 has 24 divisors (see below), whose sum is σ = 515923795296. Its totient is φ = 73698007488.

The previous prime is 221102110193. The next prime is 221102110219. The reversal of 221102110212 is 212011201122.

It is a super-2 number, since 2×221102110212² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221102110191 and 221102110200.

It is not an unprimeable number, because it can be changed into a prime (221102110219) 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, 19848 + ... + 665280.

It is an arithmetic number, because the mean of its divisors is an integer number (21496824804).

Almost surely, 2^221102110212 is an apocalyptic number.

It is an amenable number.

221102110212 is an abundant number, since it is smaller than the sum of its proper divisors (294821685084).

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

221102110212 is a wasteful number, since it uses less digits than its factorization.

221102110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673987 (or 673985 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221102110212 its reverse (212011201122), we get a palindrome (433113311334).

The spelling of 221102110212 in words is "two hundred twenty-one billion, one hundred two million, one hundred ten thousand, two hundred twelve".