21123130322191 has 8 divisors (see below), whose sum is σ = 21157365952800. Its totient is φ = 21088899593568.

The previous prime is 21123130322183. The next prime is 21123130322207. The reversal of 21123130322191 is 19122303132112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21123130322191 - 2³ = 21123130322183 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 (21123130322891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7449385 + ... + 9886333.

It is an arithmetic number, because the mean of its divisors is an integer number (2644670744100).

Almost surely, 2^{21123130322191} is an apocalyptic number.

21123130322191 is a deficient number, since it is larger than the sum of its proper divisors (34235630609).

21123130322191 is a wasteful number, since it uses less digits than its factorization.

21123130322191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450993.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 21123130322191 in words is "twenty-one trillion, one hundred twenty-three billion, one hundred thirty million, three hundred twenty-two thousand, one hundred ninety-one".