91012201 has 16 divisors (see below), whose sum is σ = 105736320. Its totient is φ = 76728960.

The previous prime is 91012153. The next prime is 91012213. The reversal of 91012201 is 10221019.

It is not a de Polignac number, because 91012201 - 2¹⁵ = 90979433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91012291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215971 + ... + 216391.

It is an arithmetic number, because the mean of its divisors is an integer number (6608520).

Almost surely, 2^91012201 is an apocalyptic number.

It is an amenable number.

91012201 is a deficient number, since it is larger than the sum of its proper divisors (14724119).

91012201 is a wasteful number, since it uses less digits than its factorization.

91012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864.

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

The square root of 91012201 is about 9540.0314988998. The cubic root of 91012201 is about 449.8142459675.

The spelling of 91012201 in words is "ninety-one million, twelve thousand, two hundred one".