91230348021 has 8 divisors (see below), whose sum is σ = 122515575840. Its totient is φ = 60382676112.

The previous prime is 91230348017. The next prime is 91230348023. The reversal of 91230348021 is 12084303219.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91230348021 - 2² = 91230348017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91230348023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109388490 + ... + 109389323.

It is an arithmetic number, because the mean of its divisors is an integer number (15314446980).

Almost surely, 2^91230348021 is an apocalyptic number.

It is an amenable number.

91230348021 is a deficient number, since it is larger than the sum of its proper divisors (31285227819).

91230348021 is a wasteful number, since it uses less digits than its factorization.

91230348021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218777955.

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 91230348021 in words is "ninety-one billion, two hundred thirty million, three hundred forty-eight thousand, twenty-one".