11112121011 has 8 divisors (see below), whose sum is σ = 14845271760. Its totient is φ = 7393525472.

The previous prime is 11112121003. The next prime is 11112121019. The reversal of 11112121011 is 11012121111.

It is an interprime number because it is at equal distance from previous prime (11112121003) and next prime (11112121019).

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

It is a cyclic number.

It is not a de Polignac number, because 11112121011 - 2³ = 11112121003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11112121019) 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, 3637020 + ... + 3640073.

It is an arithmetic number, because the mean of its divisors is an integer number (1855658970).

Almost surely, 2^11112121011 is an apocalyptic number.

11112121011 is a deficient number, since it is larger than the sum of its proper divisors (3733150749).

11112121011 is an equidigital number, since it uses as much as digits as its factorization.

11112121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7277605.

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

Adding to 11112121011 its reverse (11012121111), we get a palindrome (22124242122).

The spelling of 11112121011 in words is "eleven billion, one hundred twelve million, one hundred twenty-one thousand, eleven".