311243434222221 has 8 divisors (see below), whose sum is σ = 461101384032960. Its totient is φ = 207495622814796.

The previous prime is 311243434222207. The next prime is 311243434222277. The reversal of 311243434222221 is 122222434342113.

311243434222221 is a `hidden beast` number, since 3 + 1 + 1 + 2 + 4 + 3 + 4 + 3 + 422 + 2 + 221 = 666.

It is not a de Polignac number, because 311243434222221 - 2¹⁸ = 311243433960077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311243434222421) 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, 5763767300385 + ... + 5763767300438.

It is an arithmetic number, because the mean of its divisors is an integer number (57637673004120).

Almost surely, 2^{311243434222221} is an apocalyptic number.

It is an amenable number.

311243434222221 is a deficient number, since it is larger than the sum of its proper divisors (149857949810739).

311243434222221 is a wasteful number, since it uses less digits than its factorization.

311243434222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11527534600832 (or 11527534600826 counting only the distinct ones).

The product of its digits is 110592, while the sum is 36.

Adding to 311243434222221 its reverse (122222434342113), we get a palindrome (433465868564334).

The spelling of 311243434222221 in words is "three hundred eleven trillion, two hundred forty-three billion, four hundred thirty-four million, two hundred twenty-two thousand, two hundred twenty-one".