1321212202 has 4 divisors (see below), whose sum is σ = 1981818306. Its totient is φ = 660606100.

The previous prime is 1321212199. The next prime is 1321212203. The reversal of 1321212202 is 2022121231.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 901740841 + 419471361 = 30029^2 + 20481^2 .

It is not an unprimeable number, because it can be changed into a prime (1321212203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330303049 + ... + 330303052.

Almost surely, 2^1321212202 is an apocalyptic number.

1321212202 is a deficient number, since it is larger than the sum of its proper divisors (660606104).

1321212202 is an equidigital number, since it uses as much as digits as its factorization.

1321212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660606103.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1321212202 is about 36348.4828018997. The cubic root of 1321212202 is about 1097.2970003485.

Adding to 1321212202 its reverse (2022121231), we get a palindrome (3343333433).

The spelling of 1321212202 in words is "one billion, three hundred twenty-one million, two hundred twelve thousand, two hundred two".