201031121211 has 16 divisors (see below), whose sum is σ = 273847249440. Its totient is φ = 131140638720.

The previous prime is 201031121191. The next prime is 201031121233. The reversal of 201031121211 is 112121130102.

It is not a de Polignac number, because 201031121211 - 2⁶ = 201031121147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201031120211) 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 15 ways as a sum of consecutive naturals, for example, 2810616 + ... + 2881253.

It is an arithmetic number, because the mean of its divisors is an integer number (17115453090).

Almost surely, 2^201031121211 is an apocalyptic number.

201031121211 is a deficient number, since it is larger than the sum of its proper divisors (72816128229).

201031121211 is a wasteful number, since it uses less digits than its factorization.

201031121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5692126.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 201031121211 its reverse (112121130102), we get a palindrome (313152251313).

The spelling of 201031121211 in words is "two hundred one billion, thirty-one million, one hundred twenty-one thousand, two hundred eleven".