11222131211 has 4 divisors (see below), whose sum is σ = 11223075552. Its totient is φ = 11221186872.

The previous prime is 11222131133. The next prime is 11222131229. The reversal of 11222131211 is 11213122211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11213122211 = 67 ⋅167360033.

It is a cyclic number.

It is not a de Polignac number, because 11222131211 - 2²² = 11217936907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11222131211.

It is not an unprimeable number, because it can be changed into a prime (11222130211) 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, 454115 + ... + 478188.

It is an arithmetic number, because the mean of its divisors is an integer number (2805768888).

Almost surely, 2^11222131211 is an apocalyptic number.

11222131211 is a deficient number, since it is larger than the sum of its proper divisors (944341).

11222131211 is an equidigital number, since it uses as much as digits as its factorization.

11222131211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944340.

The product of its digits is 48, while the sum is 17.

Adding to 11222131211 its reverse (11213122211), we get a palindrome (22435253422).

It can be divided in two parts, 11 and 222131211, that added together give a palindrome (222131222).

The spelling of 11222131211 in words is "eleven billion, two hundred twenty-two million, one hundred thirty-one thousand, two hundred eleven".