212120202001 has 2 divisors, whose sum is σ = 212120202002. Its totient is φ = 212120202000.

The previous prime is 212120201941. The next prime is 212120202013. The reversal of 212120202001 is 100202021212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141695780625 + 70424421376 = 376425^2 + 265376^2 .

It is a cyclic number.

It is not a de Polignac number, because 212120202001 - 2¹¹ = 212120199953 is a prime.

It is not a weakly prime, because it can be changed into another prime (212120202061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060101000 + 106060101001.

It is an arithmetic number, because the mean of its divisors is an integer number (106060101001).

Almost surely, 2^212120202001 is an apocalyptic number.

It is an amenable number.

212120202001 is a deficient number, since it is larger than the sum of its proper divisors (1).

212120202001 is an equidigital number, since it uses as much as digits as its factorization.

212120202001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212120202001 its reverse (100202021212), we get a palindrome (312322223213).

The spelling of 212120202001 in words is "two hundred twelve billion, one hundred twenty million, two hundred two thousand, one".