21202101353 has 2 divisors, whose sum is σ = 21202101354. Its totient is φ = 21202101352.

The previous prime is 21202101337. The next prime is 21202101373. The reversal of 21202101353 is 35310120212.

It is an a-pointer prime, because the next prime (21202101373) can be obtained adding 21202101353 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21092333824 + 109767529 = 145232^2 + 10477^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202101353 - 2⁴ = 21202101337 is a prime.

It is a super-4 number, since 4×21202101353⁴ (a number of 42 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (21202101373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601050676 + 10601050677.

It is an arithmetic number, because the mean of its divisors is an integer number (10601050677).

Almost surely, 2^21202101353 is an apocalyptic number.

It is an amenable number.

21202101353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202101353 is an equidigital number, since it uses as much as digits as its factorization.

21202101353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 21202101353 its reverse (35310120212), we get a palindrome (56512221565).

The spelling of 21202101353 in words is "twenty-one billion, two hundred two million, one hundred one thousand, three hundred fifty-three".