201011002121 has 4 divisors (see below), whose sum is σ = 201028756500. Its totient is φ = 200993247744.

The previous prime is 201011002103. The next prime is 201011002123. The reversal of 201011002121 is 121200110102.

201011002121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 131243175625 + 69767826496 = 362275^2 + 264136^2 .

It is a cyclic number.

It is not a de Polignac number, because 201011002121 - 2¹⁴ = 201010985737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201011002123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8860196 + ... + 8882853.

It is an arithmetic number, because the mean of its divisors is an integer number (50257189125).

Almost surely, 2^201011002121 is an apocalyptic number.

It is an amenable number.

201011002121 is a deficient number, since it is larger than the sum of its proper divisors (17754379).

201011002121 is a wasteful number, since it uses less digits than its factorization.

201011002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17754378.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201011002121 its reverse (121200110102), we get a palindrome (322211112223).

The spelling of 201011002121 in words is "two hundred one billion, eleven million, two thousand, one hundred twenty-one".