11211231229 has 4 divisors (see below), whose sum is σ = 12230434080. Its totient is φ = 10192028380.

The previous prime is 11211231223. The next prime is 11211231253. The reversal of 11211231229 is 92213211211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11211231229 - 2²³ = 11202842621 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 (11211231223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509601409 + ... + 509601430.

It is an arithmetic number, because the mean of its divisors is an integer number (3057608520).

Almost surely, 2^11211231229 is an apocalyptic number.

It is an amenable number.

11211231229 is a deficient number, since it is larger than the sum of its proper divisors (1019202851).

11211231229 is a wasteful number, since it uses less digits than its factorization.

11211231229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019202850.

The product of its digits is 432, while the sum is 25.

It can be divided in two parts, 112112 and 31229, that added together give a palindrome (143341).

The spelling of 11211231229 in words is "eleven billion, two hundred eleven million, two hundred thirty-one thousand, two hundred twenty-nine".