101531010505 has 32 divisors (see below), whose sum is σ = 132524726400. Its totient is φ = 74410348032.

The previous prime is 101531010491. The next prime is 101531010533. The reversal of 101531010505 is 505010135101.

It is a cyclic number.

It is not a de Polignac number, because 101531010505 - 2⁵ = 101531010473 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 484341 + ... + 661549.

It is an arithmetic number, because the mean of its divisors is an integer number (4141397700).

Almost surely, 2^101531010505 is an apocalyptic number.

It is an amenable number.

101531010505 is a deficient number, since it is larger than the sum of its proper divisors (30993715895).

101531010505 is a wasteful number, since it uses less digits than its factorization.

101531010505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177433.

The product of its (nonzero) digits is 375, while the sum is 22.

Adding to 101531010505 its reverse (505010135101), we get a palindrome (606541145606).

The spelling of 101531010505 in words is "one hundred one billion, five hundred thirty-one million, ten thousand, five hundred five".