221243314311 has 24 divisors (see below), whose sum is σ = 322029601920. Its totient is φ = 146362864896.

The previous prime is 221243314301. The next prime is 221243314333. The reversal of 221243314311 is 113413342122.

221243314311 is a `hidden beast` number, since 2 + 2 + 12 + 4 + 331 + 4 + 311 = 666.

It is not a de Polignac number, because 221243314311 - 2⁶ = 221243314247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221243314301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3319531 + ... + 3385523.

It is an arithmetic number, because the mean of its divisors is an integer number (13417900080).

Almost surely, 2^221243314311 is an apocalyptic number.

221243314311 is a deficient number, since it is larger than the sum of its proper divisors (100786287609).

221243314311 is a wasteful number, since it uses less digits than its factorization.

221243314311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68855 (or 68852 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 221243314311 its reverse (113413342122), we get a palindrome (334656656433).

The spelling of 221243314311 in words is "two hundred twenty-one billion, two hundred forty-three million, three hundred fourteen thousand, three hundred eleven".