101123521111 has 2 divisors, whose sum is σ = 101123521112. Its totient is φ = 101123521110.

The previous prime is 101123521087. The next prime is 101123521133. The reversal of 101123521111 is 111125321101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101123521111 - 2¹⁹ = 101122996823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101123522111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50561760555 + 50561760556.

It is an arithmetic number, because the mean of its divisors is an integer number (50561760556).

Almost surely, 2^101123521111 is an apocalyptic number.

101123521111 is a deficient number, since it is larger than the sum of its proper divisors (1).

101123521111 is an equidigital number, since it uses as much as digits as its factorization.

101123521111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 19.

Adding to 101123521111 its reverse (111125321101), we get a palindrome (212248842212).

The spelling of 101123521111 in words is "one hundred one billion, one hundred twenty-three million, five hundred twenty-one thousand, one hundred eleven".