21122230013 has 4 divisors (see below), whose sum is σ = 21124808160. Its totient is φ = 21119651868.

The previous prime is 21122230009. The next prime is 21122230027. The reversal of 21122230013 is 31003222112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21122230013 - 2² = 21122230009 is a prime.

It is a super-2 number, since 2×21122230013² (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 = 21122229973 and 21122230000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122280013) 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, 1276745 + ... + 1293182.

It is an arithmetic number, because the mean of its divisors is an integer number (5281202040).

Almost surely, 2^21122230013 is an apocalyptic number.

It is an amenable number.

21122230013 is a deficient number, since it is larger than the sum of its proper divisors (2578147).

21122230013 is an equidigital number, since it uses as much as digits as its factorization.

21122230013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578146.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21122230013 its reverse (31003222112), we get a palindrome (52125452125).

The spelling of 21122230013 in words is "twenty-one billion, one hundred twenty-two million, two hundred thirty thousand, thirteen".