210202002022121 has 4 divisors (see below), whose sum is σ = 213339345335952. Its totient is φ = 207064658708292.

The previous prime is 210202002022093. The next prime is 210202002022123. The reversal of 210202002022121 is 121220200202012.

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 210202002022121 - 2¹⁰ = 210202002021097 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 210202002022121.

It is not an unprimeable number, because it can be changed into a prime (210202002022123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1568671656815 + ... + 1568671656948.

It is an arithmetic number, because the mean of its divisors is an integer number (53334836333988).

Almost surely, 2^{210202002022121} is an apocalyptic number.

It is an amenable number.

210202002022121 is a deficient number, since it is larger than the sum of its proper divisors (3137343313831).

210202002022121 is an equidigital number, since it uses as much as digits as its factorization.

210202002022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3137343313830.

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

Adding to 210202002022121 its reverse (121220200202012), we get a palindrome (331422202224133).

The spelling of 210202002022121 in words is "two hundred ten trillion, two hundred two billion, two million, twenty-two thousand, one hundred twenty-one".