210011202121121 has 8 divisors (see below), whose sum is σ = 212176700039304. Its totient is φ = 207845713059840.

The previous prime is 210011202121099. The next prime is 210011202121153. The reversal of 210011202121121 is 121121202110012.

It can be written as a sum of positive squares in 4 ways, for example, as 21066631225600 + 188944570895521 = 4589840^2 + 13745711^2 .

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 210011202121121 - 2³⁸ = 209736324214177 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 210011202121121.

It is not an unprimeable number, because it can be changed into a prime (210011202121421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52350041 + ... + 56218761.

It is an arithmetic number, because the mean of its divisors is an integer number (26522087504913).

Almost surely, 2^{210011202121121} is an apocalyptic number.

It is an amenable number.

210011202121121 is a deficient number, since it is larger than the sum of its proper divisors (2165497918183).

210011202121121 is an equidigital number, since it uses as much as digits as its factorization.

210011202121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428451.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210011202121121 its reverse (121121202110012), we get a palindrome (331132404231133).

The spelling of 210011202121121 in words is "two hundred ten trillion, eleven billion, two hundred two million, one hundred twenty-one thousand, one hundred twenty-one".