2121020220202 has 32 divisors (see below), whose sum is σ = 3687280655184. Its totient is φ = 906244070400.

The previous prime is 2121020220191. The next prime is 2121020220203. The reversal of 2121020220202 is 2020220201212.

It can be written as a sum of positive squares in 8 ways, for example, as 167289998121 + 1953730222081 = 409011^2 + 1397759^2 .

It is not an unprimeable number, because it can be changed into a prime (2121020220203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39306549 + ... + 39360472.

Almost surely, 2^{2121020220202} is an apocalyptic number.

2121020220202 is a deficient number, since it is larger than the sum of its proper divisors (1566260434982).

2121020220202 is a wasteful number, since it uses less digits than its factorization.

2121020220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78667114.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2121020220202 its reverse (2020220201212), we get a palindrome (4141240421414).

The spelling of 2121020220202 in words is "two trillion, one hundred twenty-one billion, twenty million, two hundred twenty thousand, two hundred two".