31120031121 has 8 divisors (see below), whose sum is σ = 41502648480. Its totient is φ = 20742050592.

The previous prime is 31120031099. The next prime is 31120031153. The reversal of 31120031121 is 12113002113.

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 31120031121 - 2⁶ = 31120031057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31120031121.

It is not an unprimeable number, because it can be changed into a prime (31120033121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1143516 + ... + 1170413.

It is an arithmetic number, because the mean of its divisors is an integer number (5187831060).

Almost surely, 2^31120031121 is an apocalyptic number.

It is an amenable number.

31120031121 is a deficient number, since it is larger than the sum of its proper divisors (10382617359).

31120031121 is a wasteful number, since it uses less digits than its factorization.

31120031121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318415.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31120031121 its reverse (12113002113), we get a palindrome (43233033234).

The spelling of 31120031121 in words is "thirty-one billion, one hundred twenty million, thirty-one thousand, one hundred twenty-one".