212203111321 has 4 divisors (see below), whose sum is σ = 212208473700. Its totient is φ = 212197748944.

The previous prime is 212203111301. The next prime is 212203111327. The reversal of 212203111321 is 123111302212.

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 160348990096 + 51854121225 = 400436^2 + 227715^2 .

It is a cyclic number.

It is not a de Polignac number, because 212203111321 - 2⁷ = 212203111193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212203111327) 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, 2621386 + ... + 2701123.

It is an arithmetic number, because the mean of its divisors is an integer number (53052118425).

Almost surely, 2^212203111321 is an apocalyptic number.

It is an amenable number.

212203111321 is a deficient number, since it is larger than the sum of its proper divisors (5362379).

212203111321 is an equidigital number, since it uses as much as digits as its factorization.

212203111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362378.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 212203111321 its reverse (123111302212), we get a palindrome (335314413533).

The spelling of 212203111321 in words is "two hundred twelve billion, two hundred three million, one hundred eleven thousand, three hundred twenty-one".