311112122121001 has 16 divisors (see below), whose sum is σ = 323248530196800. Its totient is φ = 299069631903168.

The previous prime is 311112122120993. The next prime is 311112122121013. The reversal of 311112122121001 is 100121221211113.

It is a cyclic number.

It is not a de Polignac number, because 311112122121001 - 2³ = 311112122120993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311112122121001.

It is not an unprimeable number, because it can be changed into a prime (311112122121041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1391596110 + ... + 1391819656.

It is an arithmetic number, because the mean of its divisors is an integer number (20203033137300).

Almost surely, 2^{311112122121001} is an apocalyptic number.

It is an amenable number.

311112122121001 is a deficient number, since it is larger than the sum of its proper divisors (12136408075799).

311112122121001 is a wasteful number, since it uses less digits than its factorization.

311112122121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433368.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 311112122121001 its reverse (100121221211113), we get a palindrome (411233343332114).

The spelling of 311112122121001 in words is "three hundred eleven trillion, one hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, one".