1211200020202 has 16 divisors (see below), whose sum is σ = 1881078461640. Its totient is φ = 584210092032.

The previous prime is 1211200020181. The next prime is 1211200020203. The reversal of 1211200020202 is 2020200021121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1021172901961 + 190027118241 = 1010531^2 + 435921^2 .

It is not an unprimeable number, because it can be changed into a prime (1211200020203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8988963 + ... + 9122710.

Almost surely, 2^{1211200020202} is an apocalyptic number.

1211200020202 is a deficient number, since it is larger than the sum of its proper divisors (669878441438).

1211200020202 is a wasteful number, since it uses less digits than its factorization.

1211200020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18112857.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1211200020202 its reverse (2020200021121), we get a palindrome (3231400041323).

The spelling of 1211200020202 in words is "one trillion, two hundred eleven billion, two hundred million, twenty thousand, two hundred two".