11212142231 has 16 divisors (see below), whose sum is σ = 12052800000. Its totient is φ = 10398056256.

The previous prime is 11212142213. The next prime is 11212142237. The reversal of 11212142231 is 13224121211.

It is a cyclic number.

It is not a de Polignac number, because 11212142231 - 2¹⁰ = 11212141207 is a prime.

It is a super-2 number, since 2×11212142231² (a number of 21 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 (11212142237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246995 + ... + 288843.

It is an arithmetic number, because the mean of its divisors is an integer number (753300000).

Almost surely, 2^11212142231 is an apocalyptic number.

11212142231 is a deficient number, since it is larger than the sum of its proper divisors (840657769).

11212142231 is a wasteful number, since it uses less digits than its factorization.

11212142231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42166.

The product of its digits is 192, while the sum is 20.

Adding to 11212142231 its reverse (13224121211), we get a palindrome (24436263442).

The spelling of 11212142231 in words is "eleven billion, two hundred twelve million, one hundred forty-two thousand, two hundred thirty-one".