221102100012 has 24 divisors (see below), whose sum is σ = 516098125312. Its totient is φ = 73673096400.

The previous prime is 221102100007. The next prime is 221102100013. The reversal of 221102100012 is 210001201122.

It is a super-2 number, since 2×221102100012² (a number of 23 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (221102100013) 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, 3417064 + ... + 3481167.

Almost surely, 2^221102100012 is an apocalyptic number.

It is an amenable number.

221102100012 is an abundant number, since it is smaller than the sum of its proper divisors (294996025300).

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

221102100012 is a wasteful number, since it uses less digits than its factorization.

221102100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6900909 (or 6900907 counting only the distinct ones).

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

Adding to 221102100012 its reverse (210001201122), we get a palindrome (431103301134).

The spelling of 221102100012 in words is "two hundred twenty-one billion, one hundred two million, one hundred thousand, twelve".