311100221311221 has 8 divisors (see below), whose sum is σ = 420482490904960. Its totient is φ = 204559049629152.

The previous prime is 311100221311163. The next prime is 311100221311279. The reversal of 311100221311221 is 122113122001113.

It is an interprime number because it is at equal distance from previous prime (311100221311163) and next prime (311100221311279).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 311100221311221 - 2³¹ = 311098073827573 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 (311100221311921) 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, 710274477661 + ... + 710274478098.

It is an arithmetic number, because the mean of its divisors is an integer number (52560311363120).

Almost surely, 2^{311100221311221} is an apocalyptic number.

It is an amenable number.

311100221311221 is a deficient number, since it is larger than the sum of its proper divisors (109382269593739).

311100221311221 is a wasteful number, since it uses less digits than its factorization.

311100221311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420548955835.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 311100221311221 its reverse (122113122001113), we get a palindrome (433213343312334).

The spelling of 311100221311221 in words is "three hundred eleven trillion, one hundred billion, two hundred twenty-one million, three hundred eleven thousand, two hundred twenty-one".