311404230222221 has 4 divisors (see below), whose sum is σ = 312553323322944. Its totient is φ = 310255137121500.

The previous prime is 311404230222167. The next prime is 311404230222257. The reversal of 311404230222221 is 122222032404113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311404230222221 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 (311404230222271) 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, 574546549955 + ... + 574546550496.

It is an arithmetic number, because the mean of its divisors is an integer number (78138330830736).

Almost surely, 2^{311404230222221} is an apocalyptic number.

It is an amenable number.

311404230222221 is a deficient number, since it is larger than the sum of its proper divisors (1149093100723).

311404230222221 is a wasteful number, since it uses less digits than its factorization.

311404230222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149093100722.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 311404230222221 its reverse (122222032404113), we get a palindrome (433626262626334).

The spelling of 311404230222221 in words is "three hundred eleven trillion, four hundred four billion, two hundred thirty million, two hundred twenty-two thousand, two hundred twenty-one".