21202110101113 has 2 divisors, whose sum is σ = 21202110101114. Its totient is φ = 21202110101112.

The previous prime is 21202110101077. The next prime is 21202110101131. The reversal of 21202110101113 is 31110101120212.

It is a happy number.

Together with next prime (21202110101131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19802829301369 + 1399280799744 = 4450037^2 + 1182912^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202110101113 - 2¹³ = 21202110092921 is a prime.

It is not a weakly prime, because it can be changed into another prime (21202110101813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601055050556 + 10601055050557.

It is an arithmetic number, because the mean of its divisors is an integer number (10601055050557).

Almost surely, 2^{21202110101113} is an apocalyptic number.

It is an amenable number.

21202110101113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202110101113 is an equidigital number, since it uses as much as digits as its factorization.

21202110101113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21202110101113 its reverse (31110101120212), we get a palindrome (52312211221325).

The spelling of 21202110101113 in words is "twenty-one trillion, two hundred two billion, one hundred ten million, one hundred one thousand, one hundred thirteen".