21114124249 has 3 divisors (see below), whose sum is σ = 21114269557. Its totient is φ = 21113978942.

The previous prime is 21114124231. The next prime is 21114124271. The reversal of 21114124249 is 94242141112.

The square root of 21114124249 is 145307.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 21114124249 - 2⁵ = 21114124217 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 21114124249.

It is not an unprimeable number, because it can be changed into a prime (21114124949) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 72654 + ... + 217960.

Almost surely, 2^21114124249 is an apocalyptic number.

21114124249 is the 145307-th square number.

21114124249 is the 72654-th centered octagonal number.

It is an amenable number.

21114124249 is a deficient number, since it is larger than the sum of its proper divisors (145308).

21114124249 is an frugal number, since it uses more digits than its factorization.

21114124249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290614 (or 145307 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The spelling of 21114124249 in words is "twenty-one billion, one hundred fourteen million, one hundred twenty-four thousand, two hundred forty-nine".