21212331213301 has 2 divisors, whose sum is σ = 21212331213302. Its totient is φ = 21212331213300.

The previous prime is 21212331213247. The next prime is 21212331213341. The reversal of 21212331213301 is 10331213321212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20633170640625 + 579160572676 = 4542375^2 + 761026^2 .

It is a cyclic number.

It is not a de Polignac number, because 21212331213301 - 2⁷ = 21212331213173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212331213341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606165606650 + 10606165606651.

It is an arithmetic number, because the mean of its divisors is an integer number (10606165606651).

Almost surely, 2^{21212331213301} is an apocalyptic number.

It is an amenable number.

21212331213301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212331213301 is an equidigital number, since it uses as much as digits as its factorization.

21212331213301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21212331213301 its reverse (10331213321212), we get a palindrome (31543544534513).

The spelling of 21212331213301 in words is "twenty-one trillion, two hundred twelve billion, three hundred thirty-one million, two hundred thirteen thousand, three hundred one".