221102122012 has 6 divisors (see below), whose sum is σ = 386928713528. Its totient is φ = 110551061004.

The previous prime is 221102121979. The next prime is 221102122013. The reversal of 221102122012 is 210221201122.

It is a happy number.

It is a super-2 number, since 2×221102122012² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102122013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27637765248 + ... + 27637765255.

Almost surely, 2^221102122012 is an apocalyptic number.

It is an amenable number.

221102122012 is a deficient number, since it is larger than the sum of its proper divisors (165826591516).

221102122012 is a wasteful number, since it uses less digits than its factorization.

221102122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55275530507 (or 55275530505 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221102122012 its reverse (210221201122), we get a palindrome (431323323134).

The spelling of 221102122012 in words is "two hundred twenty-one billion, one hundred two million, one hundred twenty-two thousand, twelve".