21022122013 has 2 divisors, whose sum is σ = 21022122014. Its totient is φ = 21022122012.

The previous prime is 21022122007. The next prime is 21022122031. The reversal of 21022122013 is 31022122012.

It is a happy number.

Together with next prime (21022122031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15154102404 + 5868019609 = 123102^2 + 76603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022122013 is a prime.

It is a super-2 number, since 2×21022122013² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022122073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511061006 + 10511061007.

It is an arithmetic number, because the mean of its divisors is an integer number (10511061007).

Almost surely, 2^21022122013 is an apocalyptic number.

It is an amenable number.

21022122013 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022122013 is an equidigital number, since it uses as much as digits as its factorization.

21022122013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21022122013 its reverse (31022122012), we get a palindrome (52044244025).

Subtracting 21022122013 from its reverse (31022122012), we obtain a palindrome (9999999999).

The spelling of 21022122013 in words is "twenty-one billion, twenty-two million, one hundred twenty-two thousand, thirteen".