2105122531 has 2 divisors, whose sum is σ = 2105122532. Its totient is φ = 2105122530.

The previous prime is 2105122493. The next prime is 2105122543. The reversal of 2105122531 is 1352215012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105122531 is a prime.

It is a super-2 number, since 2×2105122531² = 8863081741047691922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2105122561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052561265 + 1052561266.

It is an arithmetic number, because the mean of its divisors is an integer number (1052561266).

Almost surely, 2^2105122531 is an apocalyptic number.

2105122531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105122531 is an equidigital number, since it uses as much as digits as its factorization.

2105122531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 2105122531 is about 45881.6143024632. The cubic root of 2105122531 is about 1281.6195586236.

Adding to 2105122531 its reverse (1352215012), we get a palindrome (3457337543).

The spelling of 2105122531 in words is "two billion, one hundred five million, one hundred twenty-two thousand, five hundred thirty-one".