200210220202121 has 4 divisors (see below), whose sum is σ = 201247578856212. Its totient is φ = 199172861548032.

The previous prime is 200210220202099. The next prime is 200210220202133. The reversal of 200210220202121 is 121202022012002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145826394739600 + 54383825462521 = 12075860^2 + 7374539^2 .

It is a cyclic number.

It is not a de Polignac number, because 200210220202121 - 2²² = 200210216007817 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 200210220202121.

It is not an unprimeable number, because it can be changed into a prime (200210220202621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518679326756 + ... + 518679327141.

It is an arithmetic number, because the mean of its divisors is an integer number (50311894714053).

Almost surely, 2^{200210220202121} is an apocalyptic number.

It is an amenable number.

200210220202121 is a deficient number, since it is larger than the sum of its proper divisors (1037358654091).

200210220202121 is a wasteful number, since it uses less digits than its factorization.

200210220202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037358654090.

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

Adding to 200210220202121 its reverse (121202022012002), we get a palindrome (321412242214123).

The spelling of 200210220202121 in words is "two hundred trillion, two hundred ten billion, two hundred twenty million, two hundred two thousand, one hundred twenty-one".