102011355521 has 32 divisors (see below), whose sum is σ = 113309694720. Its totient is φ = 91515424000.

The previous prime is 102011355487. The next prime is 102011355527. The reversal of 102011355521 is 125553110201.

It is a cyclic number.

It is not a de Polignac number, because 102011355521 - 2¹⁴ = 102011339137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102011355527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3556166 + ... + 3584736.

It is an arithmetic number, because the mean of its divisors is an integer number (3540927960).

Almost surely, 2^102011355521 is an apocalyptic number.

It is an amenable number.

102011355521 is a deficient number, since it is larger than the sum of its proper divisors (11298339199).

102011355521 is a wasteful number, since it uses less digits than its factorization.

102011355521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28777.

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 102011355521 its reverse (125553110201), we get a palindrome (227564465722).

The spelling of 102011355521 in words is "one hundred two billion, eleven million, three hundred fifty-five thousand, five hundred twenty-one".