311201220000121 has 32 divisors (see below), whose sum is σ = 343483569467136. Its totient is φ = 279594749280000.

The previous prime is 311201219999951. The next prime is 311201220000161. The reversal of 311201220000121 is 121000022102113.

It is not a de Polignac number, because 311201220000121 - 2⁹ = 311201219999609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311201220000095 and 311201220000104.

It is not an unprimeable number, because it can be changed into a prime (311201220000161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1743461940 + ... + 1743640426.

It is an arithmetic number, because the mean of its divisors is an integer number (10733861545848).

Almost surely, 2^{311201220000121} is an apocalyptic number.

It is an amenable number.

311201220000121 is a deficient number, since it is larger than the sum of its proper divisors (32282349467015).

311201220000121 is a wasteful number, since it uses less digits than its factorization.

311201220000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181473.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 311201220000121 its reverse (121000022102113), we get a palindrome (432201242102234).

The spelling of 311201220000121 in words is "three hundred eleven trillion, two hundred one billion, two hundred twenty million, one hundred twenty-one", and thus it is an aban number.