201201201121 has 4 divisors (see below), whose sum is σ = 201384612612. Its totient is φ = 201017789632.

The previous prime is 201201201059. The next prime is 201201201127. The reversal of 201201201121 is 121102102102.

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 63289980625 + 137911220496 = 251575^2 + 371364^2 .

It is a cyclic number.

It is not a de Polignac number, because 201201201121 - 2⁹ = 201201200609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201201201127) 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, 91704100 + ... + 91706293.

It is an arithmetic number, because the mean of its divisors is an integer number (50346153153).

Almost surely, 2^201201201121 is an apocalyptic number.

It is an amenable number.

201201201121 is a deficient number, since it is larger than the sum of its proper divisors (183411491).

201201201121 is a wasteful number, since it uses less digits than its factorization.

201201201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183411490.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201201201121 its reverse (121102102102), we get a palindrome (322303303223).

The spelling of 201201201121 in words is "two hundred one billion, two hundred one million, two hundred one thousand, one hundred twenty-one".