212221021013 has 2 divisors, whose sum is σ = 212221021014. Its totient is φ = 212221021012.

The previous prime is 212221020967. The next prime is 212221021039. The reversal of 212221021013 is 310120122212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158370569764 + 53850451249 = 397958^2 + 232057^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221021013 - 2²² = 212216826709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212221020982 and 212221021000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212221021043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110510506 + 106110510507.

It is an arithmetic number, because the mean of its divisors is an integer number (106110510507).

Almost surely, 2^212221021013 is an apocalyptic number.

It is an amenable number.

212221021013 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221021013 is an equidigital number, since it uses as much as digits as its factorization.

212221021013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212221021013 its reverse (310120122212), we get a palindrome (522341143225).

The spelling of 212221021013 in words is "two hundred twelve billion, two hundred twenty-one million, twenty-one thousand, thirteen".