106212131 has 2 divisors, whose sum is σ = 106212132. Its totient is φ = 106212130.

The previous prime is 106212121. The next prime is 106212133. The reversal of 106212131 is 131212601.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106212131 is a prime.

It is a super-2 number, since 2×106212131² = 22562033543122322, which contains 22 as substring.

Together with 106212133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (106212133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53106065 + 53106066.

It is an arithmetic number, because the mean of its divisors is an integer number (53106066).

Almost surely, 2^106212131 is an apocalyptic number.

106212131 is a deficient number, since it is larger than the sum of its proper divisors (1).

106212131 is an equidigital number, since it uses as much as digits as its factorization.

106212131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 106212131 is about 10305.9269840223. The cubic root of 106212131 is about 473.5778419443.

Adding to 106212131 its reverse (131212601), we get a palindrome (237424732).

The spelling of 106212131 in words is "one hundred six million, two hundred twelve thousand, one hundred thirty-one".