21110341013 has 4 divisors (see below), whose sum is σ = 21508649388. Its totient is φ = 20712032640.

The previous prime is 21110341003. The next prime is 21110341051. The reversal of 21110341013 is 31014301112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11741456164 + 9368884849 = 108358^2 + 96793^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110341013 - 2²² = 21106146709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110340982 and 21110341000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110341003) 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, 199154108 + ... + 199154213.

It is an arithmetic number, because the mean of its divisors is an integer number (5377162347).

Almost surely, 2^21110341013 is an apocalyptic number.

It is an amenable number.

21110341013 is a deficient number, since it is larger than the sum of its proper divisors (398308375).

21110341013 is an equidigital number, since it uses as much as digits as its factorization.

21110341013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398308374.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21110341013 its reverse (31014301112), we get a palindrome (52124642125).

The spelling of 21110341013 in words is "twenty-one billion, one hundred ten million, three hundred forty-one thousand, thirteen".