21213303113 has 2 divisors, whose sum is σ = 21213303114. Its totient is φ = 21213303112.

The previous prime is 21213303091. The next prime is 21213303127. The reversal of 21213303113 is 31130331212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20924201104 + 289102009 = 144652^2 + 17003^2 .

It is a cyclic number.

It is not a de Polignac number, because 21213303113 - 2²⁴ = 21196525897 is a prime.

It is a super-3 number, since 3×21213303113³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21213303143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606651556 + 10606651557.

It is an arithmetic number, because the mean of its divisors is an integer number (10606651557).

Almost surely, 2^21213303113 is an apocalyptic number.

It is an amenable number.

21213303113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213303113 is an equidigital number, since it uses as much as digits as its factorization.

21213303113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21213303113 its reverse (31130331212), we get a palindrome (52343634325).

The spelling of 21213303113 in words is "twenty-one billion, two hundred thirteen million, three hundred three thousand, one hundred thirteen".