1321212203 has 2 divisors, whose sum is σ = 1321212204. Its totient is φ = 1321212202.

The previous prime is 1321212199. The next prime is 1321212293. The reversal of 1321212203 is 3022121231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321212203 - 2² = 1321212199 is a prime.

It is a super-2 number, since 2×1321212203² = 3491203370712226418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1321212293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660606101 + 660606102.

It is an arithmetic number, because the mean of its divisors is an integer number (660606102).

Almost surely, 2^1321212203 is an apocalyptic number.

1321212203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321212203 is an equidigital number, since it uses as much as digits as its factorization.

1321212203 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1321212203 is about 36348.4828156555. The cubic root of 1321212203 is about 1097.2970006254.

Adding to 1321212203 its reverse (3022121231), we get a palindrome (4343333434).

The spelling of 1321212203 in words is "one billion, three hundred twenty-one million, two hundred twelve thousand, two hundred three".