1021202121202 has 16 divisors (see below), whose sum is σ = 1534669411032. Its totient is φ = 509645790720.

The previous prime is 1021202121167. The next prime is 1021202121209. The reversal of 1021202121202 is 2021212021201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 513818009721 + 507384111481 = 716811^2 + 712309^2 .

It is not an unprimeable number, because it can be changed into a prime (1021202121209) 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, 19759948 + ... + 19811560.

Almost surely, 2^{1021202121202} is an apocalyptic number.

1021202121202 is a deficient number, since it is larger than the sum of its proper divisors (513467289830).

1021202121202 is a wasteful number, since it uses less digits than its factorization.

1021202121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69933.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1021202121202 its reverse (2021212021201), we get a palindrome (3042414142403).

The spelling of 1021202121202 in words is "one trillion, twenty-one billion, two hundred two million, one hundred twenty-one thousand, two hundred two".