21265092111 has 8 divisors (see below), whose sum is σ = 28543748400. Its totient is φ = 14081581952.

The previous prime is 21265092059. The next prime is 21265092113. The reversal of 21265092111 is 11129056212.

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 21265092111 - 2⁶ = 21265092047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21265092113) 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, 23786010 + ... + 23786903.

It is an arithmetic number, because the mean of its divisors is an integer number (3567968550).

Almost surely, 2^21265092111 is an apocalyptic number.

21265092111 is a deficient number, since it is larger than the sum of its proper divisors (7278656289).

21265092111 is a wasteful number, since it uses less digits than its factorization.

21265092111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47573065.

The product of its (nonzero) digits is 2160, while the sum is 30.

The spelling of 21265092111 in words is "twenty-one billion, two hundred sixty-five million, ninety-two thousand, one hundred eleven".