210020201221121 has 8 divisors (see below), whose sum is σ = 210043354320288. Its totient is φ = 209997049132000.

The previous prime is 210020201221099. The next prime is 210020201221189. The reversal of 210020201221121 is 121122102020012.

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 210020201221121 - 2⁴² = 205622154710017 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 210020201221121.

It is not an unprimeable number, because it can be changed into a prime (210020201821121) 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, 461181866 + ... + 461637036.

It is an arithmetic number, because the mean of its divisors is an integer number (26255419290036).

Almost surely, 2^{210020201221121} is an apocalyptic number.

It is an amenable number.

210020201221121 is a deficient number, since it is larger than the sum of its proper divisors (23153099167).

210020201221121 is a wasteful number, since it uses less digits than its factorization.

210020201221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505023.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210020201221121 its reverse (121122102020012), we get a palindrome (331142303241133).

The spelling of 210020201221121 in words is "two hundred ten trillion, twenty billion, two hundred one million, two hundred twenty-one thousand, one hundred twenty-one".