91212133301 has 4 divisors (see below), whose sum is σ = 91316138892. Its totient is φ = 91108127712.

The previous prime is 91212133297. The next prime is 91212133303. The reversal of 91212133301 is 10333121219.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58433392900 + 32778740401 = 241730^2 + 181049^2 .

It is a cyclic number.

It is not a de Polignac number, because 91212133301 - 2² = 91212133297 is a prime.

It is a super-2 number, since 2×91212133301² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91212133303) 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, 52001480 + ... + 52003233.

It is an arithmetic number, because the mean of its divisors is an integer number (22829034723).

Almost surely, 2^91212133301 is an apocalyptic number.

It is an amenable number.

91212133301 is a deficient number, since it is larger than the sum of its proper divisors (104005591).

91212133301 is a wasteful number, since it uses less digits than its factorization.

91212133301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104005590.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 91212133301 in words is "ninety-one billion, two hundred twelve million, one hundred thirty-three thousand, three hundred one".