2211201331 has 4 divisors (see below), whose sum is σ = 2231866872. Its totient is φ = 2190535792.

The previous prime is 2211201313. The next prime is 2211201337. The reversal of 2211201331 is 1331021122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2211201331 - 2¹¹ = 2211199283 is a prime.

It is a super-2 number, since 2×2211201331² = 9778822652432343122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211201337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10332610 + ... + 10332823.

It is an arithmetic number, because the mean of its divisors is an integer number (557966718).

Almost surely, 2^2211201331 is an apocalyptic number.

2211201331 is a deficient number, since it is larger than the sum of its proper divisors (20665541).

2211201331 is a wasteful number, since it uses less digits than its factorization.

2211201331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20665540.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2211201331 is about 47023.4125835206. The cubic root of 2211201331 is about 1302.7950377601.

Adding to 2211201331 its reverse (1331021122), we get a palindrome (3542222453).

The spelling of 2211201331 in words is "two billion, two hundred eleven million, two hundred one thousand, three hundred thirty-one".