11101212011 has 4 divisors (see below), whose sum is σ = 11101735800. Its totient is φ = 11100688224.

The previous prime is 11101211987. The next prime is 11101212019. The reversal of 11101212011 is 11021210111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11101212011 - 2¹⁴ = 11101195627 is a prime.

It is a super-3 number, since 3×11101212011³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11101211983 and 11101212001.

It is not an unprimeable number, because it can be changed into a prime (11101212019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228701 + ... + 272958.

It is an arithmetic number, because the mean of its divisors is an integer number (2775433950).

Almost surely, 2^11101212011 is an apocalyptic number.

11101212011 is a deficient number, since it is larger than the sum of its proper divisors (523789).

11101212011 is an equidigital number, since it uses as much as digits as its factorization.

11101212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523788.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11101212011 its reverse (11021210111), we get a palindrome (22122422122).

It can be divided in two parts, 1110 and 1212011, that added together give a palindrome (1213121).

The spelling of 11101212011 in words is "eleven billion, one hundred one million, two hundred twelve thousand, eleven".