101531011 has 2 divisors, whose sum is σ = 101531012. Its totient is φ = 101531010.

The previous prime is 101531009. The next prime is 101531029. The reversal of 101531011 is 110135101.

It is a weak prime.

It is an emirp because it is prime and its reverse (110135101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101531011 - 2¹ = 101531009 is a prime.

Together with 101531009, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 101530982 and 101531000.

It is not a weakly prime, because it can be changed into another prime (101531081) 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, 50765505 + 50765506.

It is an arithmetic number, because the mean of its divisors is an integer number (50765506).

Almost surely, 2^101531011 is an apocalyptic number.

101531011 is a deficient number, since it is larger than the sum of its proper divisors (1).

101531011 is an equidigital number, since it uses as much as digits as its factorization.

101531011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15, while the sum is 13.

The square root of 101531011 is about 10076.2597723560. The cubic root of 101531011 is about 466.5156709333.

Adding to 101531011 its reverse (110135101), we get a palindrome (211666112).

The spelling of 101531011 in words is "one hundred one million, five hundred thirty-one thousand, eleven".