21121300313 has 8 divisors (see below), whose sum is σ = 21712196736. Its totient is φ = 20538554400.

The previous prime is 21121300307. The next prime is 21121300331. The reversal of 21121300313 is 31300312112.

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 21121300313 - 2⁴ = 21121300297 is a prime.

It is a super-2 number, since 2×21121300313² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21121300291 and 21121300300.

It is not an unprimeable number, because it can be changed into a prime (21121300303) 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, 2032373 + ... + 2042738.

It is an arithmetic number, because the mean of its divisors is an integer number (2714024592).

Almost surely, 2^21121300313 is an apocalyptic number.

It is an amenable number.

21121300313 is a deficient number, since it is larger than the sum of its proper divisors (590896423).

21121300313 is an equidigital number, since it uses as much as digits as its factorization.

21121300313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075255.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21121300313 its reverse (31300312112), we get a palindrome (52421612425).

The spelling of 21121300313 in words is "twenty-one billion, one hundred twenty-one million, three hundred thousand, three hundred thirteen".