1211020202 has 12 divisors (see below), whose sum is σ = 2113106850. Its totient is φ = 519008616.

The previous prime is 1211020183. The next prime is 1211020207. The reversal of 1211020202 is 2020201121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 671898241 + 539121961 = 25921^2 + 23219^2 .

It is not an unprimeable number, because it can be changed into a prime (1211020207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6178577 + ... + 6178772.

Almost surely, 2^1211020202 is an apocalyptic number.

1211020202 is a deficient number, since it is larger than the sum of its proper divisors (902086648).

1211020202 is a wasteful number, since it uses less digits than its factorization.

1211020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12357365 (or 12357358 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1211020202 is about 34799.7155448144. The cubic root of 1211020202 is about 1065.9016373565.

Adding to 1211020202 its reverse (2020201121), we get a palindrome (3231221323).

The spelling of 1211020202 in words is "one billion, two hundred eleven million, twenty thousand, two hundred two".