210202200121 has 4 divisors (see below), whose sum is σ = 210220848000. Its totient is φ = 210183552244.

The previous prime is 210202200107. The next prime is 210202200179. The reversal of 210202200121 is 121002202012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210202200121 - 2⁹ = 210202199609 is a prime.

It is a super-3 number, since 3×210202200121³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210202200521) 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, 9307021 + ... + 9329578.

It is an arithmetic number, because the mean of its divisors is an integer number (52555212000).

Almost surely, 2^210202200121 is an apocalyptic number.

It is an amenable number.

210202200121 is a deficient number, since it is larger than the sum of its proper divisors (18647879).

210202200121 is a wasteful number, since it uses less digits than its factorization.

210202200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18647878.

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

Adding to 210202200121 its reverse (121002202012), we get a palindrome (331204402133).

The spelling of 210202200121 in words is "two hundred ten billion, two hundred two million, two hundred thousand, one hundred twenty-one".