201121311 has 8 divisors (see below), whose sum is σ = 269333680. Its totient is φ = 133494912.

The previous prime is 201121309. The next prime is 201121369. The reversal of 201121311 is 113121102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201121311 - 2¹ = 201121309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145690 + ... + 147063.

It is an arithmetic number, because the mean of its divisors is an integer number (33666710).

Almost surely, 2^201121311 is an apocalyptic number.

201121311 is a deficient number, since it is larger than the sum of its proper divisors (68212369).

201121311 is a wasteful number, since it uses less digits than its factorization.

201121311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292985.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 201121311 is about 14181.7245425230. The cubic root of 201121311 is about 585.8944225767.

Adding to 201121311 its reverse (113121102), we get a palindrome (314242413).

The spelling of 201121311 in words is "two hundred one million, one hundred twenty-one thousand, three hundred eleven".