212233030021 has 2 divisors, whose sum is σ = 212233030022. Its totient is φ = 212233030020.

The previous prime is 212233030007. The next prime is 212233030033. The reversal of 212233030021 is 120030332212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108735062500 + 103497967521 = 329750^2 + 321711^2 .

It is a cyclic number.

It is not a de Polignac number, because 212233030021 - 2⁷ = 212233029893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212233030921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106116515010 + 106116515011.

It is an arithmetic number, because the mean of its divisors is an integer number (106116515011).

Almost surely, 2^212233030021 is an apocalyptic number.

It is an amenable number.

212233030021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212233030021 is an equidigital number, since it uses as much as digits as its factorization.

212233030021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 212233030021 its reverse (120030332212), we get a palindrome (332263362233).

The spelling of 212233030021 in words is "two hundred twelve billion, two hundred thirty-three million, thirty thousand, twenty-one".