21112103013013 has 2 divisors, whose sum is σ = 21112103013014. Its totient is φ = 21112103013012.

The previous prime is 21112103012981. The next prime is 21112103013083. The reversal of 21112103013013 is 31031030121112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19621559922129 + 1490543090884 = 4429623^2 + 1220878^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112103013013 - 2⁵ = 21112103012981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112103013083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556051506506 + 10556051506507.

It is an arithmetic number, because the mean of its divisors is an integer number (10556051506507).

Almost surely, 2^{21112103013013} is an apocalyptic number.

It is an amenable number.

21112103013013 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112103013013 is an equidigital number, since it uses as much as digits as its factorization.

21112103013013 is an evil number, because the sum of its binary digits is even.

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

Adding to 21112103013013 its reverse (31031030121112), we get a palindrome (52143133134125).

The spelling of 21112103013013 in words is "twenty-one trillion, one hundred twelve billion, one hundred three million, thirteen thousand, thirteen".