11212444431 has 12 divisors (see below), whose sum is σ = 16279671408. Its totient is φ = 7436231424.

The previous prime is 11212444423. The next prime is 11212444447. The reversal of 11212444431 is 13444421211.

11212444431 is a `hidden beast` number, since 1 + 1 + 212 + 4 + 4 + 443 + 1 = 666.

It is not a de Polignac number, because 11212444431 - 2³ = 11212444423 is a prime.

It is a super-2 number, since 2×11212444431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11212444395 and 11212444404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212444421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3225795 + ... + 3229268.

It is an arithmetic number, because the mean of its divisors is an integer number (1356639284).

Almost surely, 2^11212444431 is an apocalyptic number.

11212444431 is a deficient number, since it is larger than the sum of its proper divisors (5067226977).

11212444431 is a wasteful number, since it uses less digits than its factorization.

11212444431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6455262 (or 6455259 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 11212444431 its reverse (13444421211), we get a palindrome (24656865642).

The spelling of 11212444431 in words is "eleven billion, two hundred twelve million, four hundred forty-four thousand, four hundred thirty-one".