212210102021 has 2 divisors, whose sum is σ = 212210102022. Its totient is φ = 212210102020.

The previous prime is 212210101973. The next prime is 212210102029. The reversal of 212210102021 is 120201012212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206088760900 + 6121341121 = 453970^2 + 78239^2 .

It is a cyclic number.

It is not a de Polignac number, because 212210102021 - 2¹⁰ = 212210100997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212210101987 and 212210102005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212210102029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105051010 + 106105051011.

It is an arithmetic number, because the mean of its divisors is an integer number (106105051011).

Almost surely, 2^212210102021 is an apocalyptic number.

It is an amenable number.

212210102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212210102021 is an equidigital number, since it uses as much as digits as its factorization.

212210102021 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 14.

Adding to 212210102021 its reverse (120201012212), we get a palindrome (332411114233).

The spelling of 212210102021 in words is "two hundred twelve billion, two hundred ten million, one hundred two thousand, twenty-one".