11227212115511 has 4 divisors (see below), whose sum is σ = 12831099560592. Its totient is φ = 9623324670432.

The previous prime is 11227212115453. The next prime is 11227212115519. The reversal of 11227212115511 is 11551121272211.

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 11227212115511 - 2¹⁴ = 11227212099127 is a prime.

It is a super-2 number, since 2×11227212115511² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11227212115519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801943722530 + ... + 801943722543.

It is an arithmetic number, because the mean of its divisors is an integer number (3207774890148).

Almost surely, 2^{11227212115511} is an apocalyptic number.

11227212115511 is a deficient number, since it is larger than the sum of its proper divisors (1603887445081).

11227212115511 is an equidigital number, since it uses as much as digits as its factorization.

11227212115511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603887445080.

The product of its digits is 2800, while the sum is 32.

Adding to 11227212115511 its reverse (11551121272211), we get a palindrome (22778333387722).

The spelling of 11227212115511 in words is "eleven trillion, two hundred twenty-seven billion, two hundred twelve million, one hundred fifteen thousand, five hundred eleven".