21124202311 has 8 divisors (see below), whose sum is σ = 22269579264. Its totient is φ = 20007822360.

The previous prime is 21124202303. The next prime is 21124202347. The reversal of 21124202311 is 11320242112.

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 21124202311 - 2³ = 21124202303 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 (21124202111) 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, 7247755 + ... + 7250668.

It is an arithmetic number, because the mean of its divisors is an integer number (2783697408).

Almost surely, 2^21124202311 is an apocalyptic number.

21124202311 is a deficient number, since it is larger than the sum of its proper divisors (1145376953).

21124202311 is a wasteful number, since it uses less digits than its factorization.

21124202311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14498501.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21124202311 its reverse (11320242112), we get a palindrome (32444444423).

The spelling of 21124202311 in words is "twenty-one billion, one hundred twenty-four million, two hundred two thousand, three hundred eleven".