1213221202 has 4 divisors (see below), whose sum is σ = 1819831806. Its totient is φ = 606610600.

The previous prime is 1213221169. The next prime is 1213221203. The reversal of 1213221202 is 2021223121.

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., 1197229201 + 15992001 = 34601^2 + 3999^2 .

It is not an unprimeable number, because it can be changed into a prime (1213221203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303305299 + ... + 303305302.

Almost surely, 2^1213221202 is an apocalyptic number.

1213221202 is a deficient number, since it is larger than the sum of its proper divisors (606610604).

1213221202 is an equidigital number, since it uses as much as digits as its factorization.

1213221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606610603.

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

The square root of 1213221202 is about 34831.3250106854. The cubic root of 1213221202 is about 1066.5469967092.

Adding to 1213221202 its reverse (2021223121), we get a palindrome (3234444323).

The spelling of 1213221202 in words is "one billion, two hundred thirteen million, two hundred twenty-one thousand, two hundred two".