21124011308 has 12 divisors (see below), whose sum is σ = 37868654712. Its totient is φ = 10304395680.

The previous prime is 21124011301. The next prime is 21124011313. The reversal of 21124011308 is 80311042112.

It is not an unprimeable number, because it can be changed into a prime (21124011301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64402310 + ... + 64402637.

It is an arithmetic number, because the mean of its divisors is an integer number (3155721226).

Almost surely, 2^21124011308 is an apocalyptic number.

It is an amenable number.

21124011308 is a deficient number, since it is larger than the sum of its proper divisors (16744643404).

21124011308 is a wasteful number, since it uses less digits than its factorization.

21124011308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128804992 (or 128804990 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The spelling of 21124011308 in words is "twenty-one billion, one hundred twenty-four million, eleven thousand, three hundred eight".