11212211212238 has 16 divisors (see below), whose sum is σ = 18058441260384. Its totient is φ = 5202020113920.

The previous prime is 11212211212231. The next prime is 11212211212259. The reversal of 11212211212238 is 83221211221211.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11212211212238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212211212231) 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, 2322327995 + ... + 2322332822.

It is an arithmetic number, because the mean of its divisors is an integer number (1128652578774).

Almost surely, 2^{11212211212238} is an apocalyptic number.

11212211212238 is a deficient number, since it is larger than the sum of its proper divisors (6846230048146).

11212211212238 is a wasteful number, since it uses less digits than its factorization.

11212211212238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4644660907.

The product of its digits is 1536, while the sum is 29.

Adding to 11212211212238 its reverse (83221211221211), we get a palindrome (94433422433449).

The spelling of 11212211212238 in words is "eleven trillion, two hundred twelve billion, two hundred eleven million, two hundred twelve thousand, two hundred thirty-eight".