212210303021 has 4 divisors (see below), whose sum is σ = 212523760572. Its totient is φ = 211896845472.

The previous prime is 212210302981. The next prime is 212210303033. The reversal of 212210303021 is 120303012212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 192360310921 + 19849992100 = 438589^2 + 140890^2 .

It is a cyclic number.

It is not a de Polignac number, because 212210303021 - 2⁶ = 212210302957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212210363021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156727760 + ... + 156729113.

It is an arithmetic number, because the mean of its divisors is an integer number (53130940143).

Almost surely, 2^212210303021 is an apocalyptic number.

It is an amenable number.

212210303021 is a deficient number, since it is larger than the sum of its proper divisors (313457551).

212210303021 is an equidigital number, since it uses as much as digits as its factorization.

212210303021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313457550.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 212210303021 its reverse (120303012212), we get a palindrome (332513315233).

The spelling of 212210303021 in words is "two hundred twelve billion, two hundred ten million, three hundred three thousand, twenty-one".