11111221201012 has 24 divisors (see below), whose sum is σ = 19796009375520. Its totient is φ = 5455426162080.

The previous prime is 11111221200931. The next prime is 11111221201037. The reversal of 11111221201012 is 21010212211111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25740439 + ... + 26168542.

It is an arithmetic number, because the mean of its divisors is an integer number (824833723980).

Almost surely, 2^{11111221201012} is an apocalyptic number.

It is an amenable number.

11111221201012 is a deficient number, since it is larger than the sum of its proper divisors (8684788174508).

11111221201012 is a wasteful number, since it uses less digits than its factorization.

11111221201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51909951 (or 51909949 counting only the distinct ones).

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

Adding to 11111221201012 its reverse (21010212211111), we get a palindrome (32121433412123).

The spelling of 11111221201012 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, two hundred one thousand, twelve".