31110121 has 16 divisors (see below), whose sum is σ = 36426240. Its totient is φ = 26020800.

The previous prime is 31110091. The next prime is 31110133. The reversal of 31110121 is 12101113.

It is a cyclic number.

It is not a de Polignac number, because 31110121 - 2⁵ = 31110089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31110098 and 31110107.

It is not an unprimeable number, because it can be changed into a prime (31110151) 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, 55575 + ... + 56131.

It is an arithmetic number, because the mean of its divisors is an integer number (2276640).

Almost surely, 2^31110121 is an apocalyptic number.

It is an amenable number.

31110121 is a deficient number, since it is larger than the sum of its proper divisors (5316119).

31110121 is a wasteful number, since it uses less digits than its factorization.

31110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 31110121 is about 5577.6447538365. The cubic root of 31110121 is about 314.5095955277.

Adding to 31110121 its reverse (12101113), we get a palindrome (43211234).

The spelling of 31110121 in words is "thirty-one million, one hundred ten thousand, one hundred twenty-one".