21202111612603 has 2 divisors, whose sum is σ = 21202111612604. Its totient is φ = 21202111612602.

The previous prime is 21202111612597. The next prime is 21202111612609. The reversal of 21202111612603 is 30621611120212.

It is a balanced prime because it is at equal distance from previous prime (21202111612597) and next prime (21202111612609).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202111612603 is a prime.

It is not a weakly prime, because it can be changed into another prime (21202111612609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601055806301 + 10601055806302.

It is an arithmetic number, because the mean of its divisors is an integer number (10601055806302).

Almost surely, 2^{21202111612603} is an apocalyptic number.

21202111612603 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202111612603 is an equidigital number, since it uses as much as digits as its factorization.

21202111612603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 21202111612603 its reverse (30621611120212), we get a palindrome (51823722732815).

The spelling of 21202111612603 in words is "twenty-one trillion, two hundred two billion, one hundred eleven million, six hundred twelve thousand, six hundred three".