210202002220121 has 8 divisors (see below), whose sum is σ = 210766149597960. Its totient is φ = 209637858068352.

The previous prime is 210202002220057. The next prime is 210202002220181. The reversal of 210202002220121 is 121022200202012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 135657151368025 + 74544850852096 = 11647195^2 + 8633936^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210202002220121 - 2⁶ = 210202002220057 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 210202002220121.

It is not an unprimeable number, because it can be changed into a prime (210202002220181) 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, 190429031 + ... + 191529683.

It is an arithmetic number, because the mean of its divisors is an integer number (26345768699745).

Almost surely, 2^{210202002220121} is an apocalyptic number.

It is an amenable number.

210202002220121 is a deficient number, since it is larger than the sum of its proper divisors (564147377839).

210202002220121 is a wasteful number, since it uses less digits than its factorization.

210202002220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613035.

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

Adding to 210202002220121 its reverse (121022200202012), we get a palindrome (331224202422133).

The spelling of 210202002220121 in words is "two hundred ten trillion, two hundred two billion, two million, two hundred twenty thousand, one hundred twenty-one".