122206531 has 2 divisors, whose sum is σ = 122206532. Its totient is φ = 122206530.

The previous prime is 122206507. The next prime is 122206541. The reversal of 122206531 is 135602221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122206531 is a prime.

It is a super-2 number, since 2×122206531² = 29868872438107922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122206501) 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, 61103265 + 61103266.

It is an arithmetic number, because the mean of its divisors is an integer number (61103266).

Almost surely, 2^122206531 is an apocalyptic number.

122206531 is a deficient number, since it is larger than the sum of its proper divisors (1).

122206531 is an equidigital number, since it uses as much as digits as its factorization.

122206531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 122206531 is about 11054.7062828462. The cubic root of 122206531 is about 496.2472793071.

Adding to 122206531 its reverse (135602221), we get a palindrome (257808752).

The spelling of 122206531 in words is "one hundred twenty-two million, two hundred six thousand, five hundred thirty-one".