1216021202 has 12 divisors (see below), whose sum is σ = 2004927918. Its totient is φ = 552736800.

The previous prime is 1216021187. The next prime is 1216021207. The reversal of 1216021202 is 2021206121.

It can be written as a sum of positive squares in only one way, i.e., 874917241 + 341103961 = 29579^2 + 18469^2 .

It is not an unprimeable number, because it can be changed into a prime (1216021207) 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 in 5 ways as a sum of consecutive naturals, for example, 2512199 + ... + 2512682.

Almost surely, 2^1216021202 is an apocalyptic number.

1216021202 is a deficient number, since it is larger than the sum of its proper divisors (788906716).

1216021202 is a wasteful number, since it uses less digits than its factorization.

1216021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024905 (or 5024894 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1216021202 is about 34871.4955515246. The cubic root of 1216021202 is about 1067.3668629014.

Adding to 1216021202 its reverse (2021206121), we get a palindrome (3237227323).

The spelling of 1216021202 in words is "one billion, two hundred sixteen million, twenty-one thousand, two hundred two".