10111221111 has 16 divisors (see below), whose sum is σ = 14028981120. Its totient is φ = 6472452000.

The previous prime is 10111221101. The next prime is 10111221119. The reversal of 10111221111 is 11112211101.

It is not a de Polignac number, because 10111221111 - 2⁶ = 10111221047 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 656640 + ... + 671861.

It is an arithmetic number, because the mean of its divisors is an integer number (876811320).

Almost surely, 2^10111221111 is an apocalyptic number.

10111221111 is a deficient number, since it is larger than the sum of its proper divisors (3917760009).

10111221111 is a wasteful number, since it uses less digits than its factorization.

10111221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328606.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 10111221111 its reverse (11112211101), we get a palindrome (21223432212).

The spelling of 10111221111 in words is "ten billion, one hundred eleven million, two hundred twenty-one thousand, one hundred eleven".