91010100101 has 4 divisors (see below), whose sum is σ = 92368459872. Its totient is φ = 89651740332.

The previous prime is 91010100091. The next prime is 91010100107. The reversal of 91010100101 is 10100101019.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10100101019 = 883 ⋅11438393.

It is a cyclic number.

It is not a de Polignac number, because 91010100101 - 2¹⁰ = 91010099077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91010100107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679179785 + ... + 679179918.

It is an arithmetic number, because the mean of its divisors is an integer number (23092114968).

Almost surely, 2^91010100101 is an apocalyptic number.

It is an amenable number.

91010100101 is a deficient number, since it is larger than the sum of its proper divisors (1358359771).

91010100101 is a wasteful number, since it uses less digits than its factorization.

91010100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358359770.

The product of its (nonzero) digits is 9, while the sum is 14.

The spelling of 91010100101 in words is "ninety-one billion, ten million, one hundred thousand, one hundred one".