12212838531 has 16 divisors (see below), whose sum is σ = 18152041600. Its totient is φ = 8115366024.

The previous prime is 12212838497. The next prime is 12212838553. The reversal of 12212838531 is 13583821221.

12212838531 is a `hidden beast` number, since 1 + 221 + 28 + 385 + 31 = 666.

It is not a de Polignac number, because 12212838531 - 2⁹ = 12212838019 is a prime.

It is a super-2 number, since 2×12212838531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12212838331) 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, 728401 + ... + 744978.

It is an arithmetic number, because the mean of its divisors is an integer number (1134502600).

Almost surely, 2^12212838531 is an apocalyptic number.

12212838531 is a deficient number, since it is larger than the sum of its proper divisors (5939203069).

12212838531 is a wasteful number, since it uses less digits than its factorization.

12212838531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473695 (or 1473689 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The spelling of 12212838531 in words is "twelve billion, two hundred twelve million, eight hundred thirty-eight thousand, five hundred thirty-one".