21213303011 has 2 divisors, whose sum is σ = 21213303012. Its totient is φ = 21213303010.

The previous prime is 21213302987. The next prime is 21213303037. The reversal of 21213303011 is 11030331212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21213303011 - 2¹⁰ = 21213301987 is a prime.

It is a super-2 number, since 2×21213303011² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21213303071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606651505 + 10606651506.

It is an arithmetic number, because the mean of its divisors is an integer number (10606651506).

Almost surely, 2^21213303011 is an apocalyptic number.

21213303011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213303011 is an equidigital number, since it uses as much as digits as its factorization.

21213303011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21213303011 its reverse (11030331212), we get a palindrome (32243634223).

The spelling of 21213303011 in words is "twenty-one billion, two hundred thirteen million, three hundred three thousand, eleven".