91020002101 has 16 divisors (see below), whose sum is σ = 104798171520. Its totient is φ = 77435951040.

The previous prime is 91020002057. The next prime is 91020002147. The reversal of 91020002101 is 10120002019.

It is not a de Polignac number, because 91020002101 - 2¹¹ = 91020000053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91020002201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4735731 + ... + 4754911.

It is an arithmetic number, because the mean of its divisors is an integer number (6549885720).

Almost surely, 2^91020002101 is an apocalyptic number.

It is an amenable number.

91020002101 is a deficient number, since it is larger than the sum of its proper divisors (13778169419).

91020002101 is a wasteful number, since it uses less digits than its factorization.

91020002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24204.

The product of its (nonzero) digits is 36, while the sum is 16.

The spelling of 91020002101 in words is "ninety-one billion, twenty million, two thousand, one hundred one".