121000031311 has 4 divisors (see below), whose sum is σ = 121199372992. Its totient is φ = 120800689632.

The previous prime is 121000031267. The next prime is 121000031323. The reversal of 121000031311 is 113130000121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113130000121 = 257 ⋅440194553.

It is a cyclic number.

It is not a de Polignac number, because 121000031311 - 2⁹ = 121000030799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121000031291 and 121000031300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000031371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99669930 + ... + 99671143.

It is an arithmetic number, because the mean of its divisors is an integer number (30299843248).

Almost surely, 2^121000031311 is an apocalyptic number.

121000031311 is a deficient number, since it is larger than the sum of its proper divisors (199341681).

121000031311 is an equidigital number, since it uses as much as digits as its factorization.

121000031311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199341680.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 121000031311 its reverse (113130000121), we get a palindrome (234130031432).

The spelling of 121000031311 in words is "one hundred twenty-one billion, thirty-one thousand, three hundred eleven".