201012012220121 has 4 divisors (see below), whose sum is σ = 201013899107892. Its totient is φ = 201010125332352.

The previous prime is 201012012220079. The next prime is 201012012220139. The reversal of 201012012220121 is 121022210210102.

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 7205659760896 + 193806352459225 = 2684336^2 + 13921435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201012012220121 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 201012012220121.

It is not an unprimeable number, because it can be changed into a prime (201012012220021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943284080 + ... + 943497153.

It is an arithmetic number, because the mean of its divisors is an integer number (50253474776973).

Almost surely, 2^{201012012220121} is an apocalyptic number.

It is an amenable number.

201012012220121 is a deficient number, since it is larger than the sum of its proper divisors (1886887771).

201012012220121 is a wasteful number, since it uses less digits than its factorization.

201012012220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886887770.

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

Adding to 201012012220121 its reverse (121022210210102), we get a palindrome (322034222430223).

The spelling of 201012012220121 in words is "two hundred one trillion, twelve billion, twelve million, two hundred twenty thousand, one hundred twenty-one".