311112333121021 has 4 divisors (see below), whose sum is σ = 327486666443200. Its totient is φ = 294737999798844.

The previous prime is 311112333120923. The next prime is 311112333121069. The reversal of 311112333121021 is 120121333211113.

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 not a de Polignac number, because 311112333121021 - 2⁷ = 311112333120893 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 (311112333191021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8187166661061 + ... + 8187166661098.

It is an arithmetic number, because the mean of its divisors is an integer number (81871666610800).

Almost surely, 2^{311112333121021} is an apocalyptic number.

It is an amenable number.

311112333121021 is a deficient number, since it is larger than the sum of its proper divisors (16374333322179).

311112333121021 is a wasteful number, since it uses less digits than its factorization.

311112333121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16374333322178.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 311112333121021 its reverse (120121333211113), we get a palindrome (431233666332134).

The spelling of 311112333121021 in words is "three hundred eleven trillion, one hundred twelve billion, three hundred thirty-three million, one hundred twenty-one thousand, twenty-one".