21124530013099 has 4 divisors (see below), whose sum is σ = 21523106051136. Its totient is φ = 20725953975064.

The previous prime is 21124530013079. The next prime is 21124530013117. The reversal of 21124530013099 is 99031003542112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21124530013099 - 2¹⁵ = 21124529980331 is a prime.

It is a super-2 number, since 2×21124530013099² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21124530013079) 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, 199288018939 + ... + 199288019044.

It is an arithmetic number, because the mean of its divisors is an integer number (5380776512784).

Almost surely, 2^{21124530013099} is an apocalyptic number.

21124530013099 is a deficient number, since it is larger than the sum of its proper divisors (398576038037).

21124530013099 is an equidigital number, since it uses as much as digits as its factorization.

21124530013099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398576038036.

The product of its (nonzero) digits is 58320, while the sum is 40.

The spelling of 21124530013099 in words is "twenty-one trillion, one hundred twenty-four billion, five hundred thirty million, thirteen thousand, ninety-nine".