200202212020121 has 24 divisors (see below), whose sum is σ = 206446975042440. Its totient is φ = 194128133559552.

The previous prime is 200202212020067. The next prime is 200202212020169. The reversal of 200202212020121 is 121020212202002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20278486010896 + 179923726009225 = 4503164^2 + 13413565^2 .

It is a de Polignac number, because none of the positive numbers 2^k-200202212020121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200202212020121.

It is not an unprimeable number, because it can be changed into a prime (200202212026121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3476126501 + ... + 3476184093.

It is an arithmetic number, because the mean of its divisors is an integer number (8601957293435).

Almost surely, 2^{200202212020121} is an apocalyptic number.

It is an amenable number.

200202212020121 is a deficient number, since it is larger than the sum of its proper divisors (6244763022319).

200202212020121 is a wasteful number, since it uses less digits than its factorization.

200202212020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72233 (or 72186 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 200202212020121 its reverse (121020212202002), we get a palindrome (321222424222123).

The spelling of 200202212020121 in words is "two hundred trillion, two hundred two billion, two hundred twelve million, twenty thousand, one hundred twenty-one".