91101020213 has 32 divisors (see below), whose sum is σ = 108394536960. Its totient is φ = 74953607040.

The previous prime is 91101020201. The next prime is 91101020233. The reversal of 91101020213 is 31202010119.

It is a cyclic number.

It is not a de Polignac number, because 91101020213 - 2²⁶ = 91033911349 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 (91101020233) 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, 4288448 + ... + 4309638.

It is an arithmetic number, because the mean of its divisors is an integer number (3387329280).

Almost surely, 2^91101020213 is an apocalyptic number.

It is an amenable number.

91101020213 is a deficient number, since it is larger than the sum of its proper divisors (17293516747).

91101020213 is a wasteful number, since it uses less digits than its factorization.

91101020213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21497.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 91101020213 in words is "ninety-one billion, one hundred one million, twenty thousand, two hundred thirteen".