11212212131231 has 16 divisors (see below), whose sum is σ = 11290611294144. Its totient is φ = 11133976080384.

The previous prime is 11212212131209. The next prime is 11212212131249. The reversal of 11212212131231 is 13213121221211.

It is a cyclic number.

It is not a de Polignac number, because 11212212131231 - 2³⁸ = 10937334224287 is a prime.

It is a super-2 number, since 2×11212212131231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212212131197 and 11212212131206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212212131261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733439870 + ... + 733455156.

It is an arithmetic number, because the mean of its divisors is an integer number (705663205884).

Almost surely, 2^{11212212131231} is an apocalyptic number.

11212212131231 is a deficient number, since it is larger than the sum of its proper divisors (78399162913).

11212212131231 is a wasteful number, since it uses less digits than its factorization.

11212212131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20290.

The product of its digits is 288, while the sum is 23.

Adding to 11212212131231 its reverse (13213121221211), we get a palindrome (24425333352442).

The spelling of 11212212131231 in words is "eleven trillion, two hundred twelve billion, two hundred twelve million, one hundred thirty-one thousand, two hundred thirty-one".