21011113203130 has 8 divisors (see below), whose sum is σ = 37820003765652. Its totient is φ = 8404445281248.

The previous prime is 21011113203107. The next prime is 21011113203139. The reversal of 21011113203130 is 3130231111012.

It can be written as a sum of positive squares in 2 ways, for example, as 20943537640921 + 67575562209 = 4576411^2 + 259953^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21011113203098 and 21011113203107.

It is not an unprimeable number, because it can be changed into a prime (21011113203139) 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, 1050555660147 + ... + 1050555660166.

Almost surely, 2^{21011113203130} is an apocalyptic number.

21011113203130 is a deficient number, since it is larger than the sum of its proper divisors (16808890562522).

21011113203130 is a wasteful number, since it uses less digits than its factorization.

21011113203130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101111320320.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21011113203130 its reverse (3130231111012), we get a palindrome (24141344314142).

The spelling of 21011113203130 in words is "twenty-one trillion, eleven billion, one hundred thirteen million, two hundred three thousand, one hundred thirty".