11121231111 has 8 divisors (see below), whose sum is σ = 14829644544. Its totient is φ = 7413485880.

The previous prime is 11121231103. The next prime is 11121231151. The reversal of 11121231111 is 11113212111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11121231111 - 2³ = 11121231103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121231151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126831 + ... + 195776.

It is an arithmetic number, because the mean of its divisors is an integer number (1853705568).

Almost surely, 2^11121231111 is an apocalyptic number.

11121231111 is a deficient number, since it is larger than the sum of its proper divisors (3708413433).

11121231111 is a wasteful number, since it uses less digits than its factorization.

11121231111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334101.

The product of its digits is 12, while the sum is 15.

Adding to 11121231111 its reverse (11113212111), we get a palindrome (22234443222).

The spelling of 11121231111 in words is "eleven billion, one hundred twenty-one million, two hundred thirty-one thousand, one hundred eleven".