1011112121111 has 16 divisors (see below), whose sum is σ = 1028505600000. Its totient is φ = 993836066496.

The previous prime is 1011112121093. The next prime is 1011112121137. The reversal of 1011112121111 is 1111212111101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011112121111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011112126111) 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, 87772010 + ... + 87783528.

It is an arithmetic number, because the mean of its divisors is an integer number (64281600000).

Almost surely, 2^{1011112121111} is an apocalyptic number.

1011112121111 is a deficient number, since it is larger than the sum of its proper divisors (17393478889).

1011112121111 is a wasteful number, since it uses less digits than its factorization.

1011112121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16486.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 1011112121111 its reverse (1111212111101), we get a palindrome (2122324232212).

It can be divided in two parts, 101111 and 2121111, that added together give a palindrome (2222222).

The spelling of 1011112121111 in words is "one trillion, eleven billion, one hundred twelve million, one hundred twenty-one thousand, one hundred eleven".