31310110121 has 8 divisors (see below), whose sum is σ = 31529842944. Its totient is φ = 31090634640.

The previous prime is 31310110109. The next prime is 31310110123. The reversal of 31310110121 is 12101101313.

It is a happy number.

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

It is not a de Polignac number, because 31310110121 - 2¹⁸ = 31309847977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31310110096 and 31310110105.

It is not an unprimeable number, because it can be changed into a prime (31310110123) 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 7 ways as a sum of consecutive naturals, for example, 183176 + ... + 310118.

It is an arithmetic number, because the mean of its divisors is an integer number (3941230368).

Almost surely, 2^31310110121 is an apocalyptic number.

It is an amenable number.

31310110121 is a deficient number, since it is larger than the sum of its proper divisors (219732823).

31310110121 is a wasteful number, since it uses less digits than its factorization.

31310110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128671.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 31310110121 its reverse (12101101313), we get a palindrome (43411211434).

The spelling of 31310110121 in words is "thirty-one billion, three hundred ten million, one hundred ten thousand, one hundred twenty-one".