201012211120121 has 4 divisors (see below), whose sum is σ = 203270775290100. Its totient is φ = 198753646950144.

The previous prime is 201012211120043. The next prime is 201012211120129. The reversal of 201012211120121 is 121021112210102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28152956836096 + 172859254284025 = 5305936^2 + 13147595^2 .

It is a cyclic number.

It is not a de Polignac number, because 201012211120121 - 2³⁰ = 201011137378297 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 201012211120121.

It is not an unprimeable number, because it can be changed into a prime (201012211120129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1129282084856 + ... + 1129282085033.

It is an arithmetic number, because the mean of its divisors is an integer number (50817693822525).

Almost surely, 2^{201012211120121} is an apocalyptic number.

It is an amenable number.

201012211120121 is a deficient number, since it is larger than the sum of its proper divisors (2258564169979).

201012211120121 is an equidigital number, since it uses as much as digits as its factorization.

201012211120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258564169978.

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

Adding to 201012211120121 its reverse (121021112210102), we get a palindrome (322033323330223).

The spelling of 201012211120121 in words is "two hundred one trillion, twelve billion, two hundred eleven million, one hundred twenty thousand, one hundred twenty-one".