10111221112 has 16 divisors (see below), whose sum is σ = 18959626800. Its totient is φ = 5055320640.

The previous prime is 10111221101. The next prime is 10111221119. The reversal of 10111221112 is 21112211101.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 10111221092 and 10111221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111221119) 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, 212037 + ... + 255307.

It is an arithmetic number, because the mean of its divisors is an integer number (1184976675).

Almost surely, 2^10111221112 is an apocalyptic number.

It is an amenable number.

10111221112 is a deficient number, since it is larger than the sum of its proper divisors (8848405688).

10111221112 is a wasteful number, since it uses less digits than its factorization.

10111221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72486 (or 72482 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10111221112 its reverse (21112211101), we get a palindrome (31223432213).

The spelling of 10111221112 in words is "ten billion, one hundred eleven million, two hundred twenty-one thousand, one hundred twelve".