311133043221 has 32 divisors (see below), whose sum is σ = 556993425408. Its totient is φ = 149194664640.

The previous prime is 311133043157. The next prime is 311133043261. The reversal of 311133043221 is 122340331113.

It is not a de Polignac number, because 311133043221 - 2⁶ = 311133043157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311133043191 and 311133043200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311133043261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51800701 + ... + 51806706.

It is an arithmetic number, because the mean of its divisors is an integer number (17406044544).

Almost surely, 2^311133043221 is an apocalyptic number.

It is an amenable number.

311133043221 is a deficient number, since it is larger than the sum of its proper divisors (245860382187).

311133043221 is a wasteful number, since it uses less digits than its factorization.

311133043221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103607441.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 311133043221 its reverse (122340331113), we get a palindrome (433473374334).

The spelling of 311133043221 in words is "three hundred eleven billion, one hundred thirty-three million, forty-three thousand, two hundred twenty-one".