21191466241 has 8 divisors (see below), whose sum is σ = 23119020000. Its totient is φ = 19264088640.

The previous prime is 21191466223. The next prime is 21191466269. The reversal of 21191466241 is 14266419112.

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 21191466241 - 2²⁵ = 21157911809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21191466241.

It is not an unprimeable number, because it can be changed into a prime (21191466221) 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, 421705 + ... + 469273.

It is an arithmetic number, because the mean of its divisors is an integer number (2889877500).

Almost surely, 2^21191466241 is an apocalyptic number.

It is an amenable number.

21191466241 is a deficient number, since it is larger than the sum of its proper divisors (1927553759).

21191466241 is a wasteful number, since it uses less digits than its factorization.

21191466241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88079.

The product of its digits is 20736, while the sum is 37.

The spelling of 21191466241 in words is "twenty-one billion, one hundred ninety-one million, four hundred sixty-six thousand, two hundred forty-one".