212113412131 has 4 divisors (see below), whose sum is σ = 212212671832. Its totient is φ = 212014152432.

The previous prime is 212113412053. The next prime is 212113412177. The reversal of 212113412131 is 131214311212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212113412131 is a prime.

It is a super-2 number, since 2×212113412131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212113412431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49626645 + ... + 49630918.

It is an arithmetic number, because the mean of its divisors is an integer number (53053167958).

Almost surely, 2^212113412131 is an apocalyptic number.

212113412131 is a deficient number, since it is larger than the sum of its proper divisors (99259701).

212113412131 is an equidigital number, since it uses as much as digits as its factorization.

212113412131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99259700.

The product of its digits is 288, while the sum is 22.

Adding to 212113412131 its reverse (131214311212), we get a palindrome (343327723343).

The spelling of 212113412131 in words is "two hundred twelve billion, one hundred thirteen million, four hundred twelve thousand, one hundred thirty-one".