21124300012 has 12 divisors (see below), whose sum is σ = 36974097160. Its totient is φ = 10560272256.

The previous prime is 21124299983. The next prime is 21124300019. The reversal of 21124300012 is 21000342112.

It is not an unprimeable number, because it can be changed into a prime (21124300019) 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, 443973 + ... + 489244.

Almost surely, 2^21124300012 is an apocalyptic number.

It is an amenable number.

21124300012 is a deficient number, since it is larger than the sum of its proper divisors (15849797148).

21124300012 is a wasteful number, since it uses less digits than its factorization.

21124300012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938880 (or 938878 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21124300012 its reverse (21000342112), we get a palindrome (42124642124).

The spelling of 21124300012 in words is "twenty-one billion, one hundred twenty-four million, three hundred thousand, twelve".