1221313202 has 16 divisors (see below), whose sum is σ = 1912524480. Its totient is φ = 583830192.

The previous prime is 1221313193. The next prime is 1221313213. The reversal of 1221313202 is 2023131221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118949 + ... + 128807.

It is an arithmetic number, because the mean of its divisors is an integer number (119532780).

Almost surely, 2^1221313202 is an apocalyptic number.

1221313202 is a deficient number, since it is larger than the sum of its proper divisors (691211278).

1221313202 is a wasteful number, since it uses less digits than its factorization.

1221313202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12577.

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

The square root of 1221313202 is about 34947.2917691772. The cubic root of 1221313202 is about 1068.9129793880.

Adding to 1221313202 its reverse (2023131221), we get a palindrome (3244444423).

The spelling of 1221313202 in words is "one billion, two hundred twenty-one million, three hundred thirteen thousand, two hundred two".