21112120202113 has 2 divisors, whose sum is σ = 21112120202114. Its totient is φ = 21112120202112.

The previous prime is 21112120202099. The next prime is 21112120202123. The reversal of 21112120202113 is 31120202121112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13675743913329 + 7436376288784 = 3698073^2 + 2726972^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112120202113 - 2¹⁷ = 21112120071041 is a prime.

It is not a weakly prime, because it can be changed into another prime (21112120202123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556060101056 + 10556060101057.

It is an arithmetic number, because the mean of its divisors is an integer number (10556060101057).

Almost surely, 2^{21112120202113} is an apocalyptic number.

It is an amenable number.

21112120202113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112120202113 is an equidigital number, since it uses as much as digits as its factorization.

21112120202113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21112120202113 its reverse (31120202121112), we get a palindrome (52232322323225).

The spelling of 21112120202113 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty million, two hundred two thousand, one hundred thirteen".