31112031121 has 8 divisors (see below), whose sum is σ = 31361598464. Its totient is φ = 30862535760.

The previous prime is 31112031113. The next prime is 31112031163. The reversal of 31112031121 is 12113021113.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31112031121 - 2³ = 31112031113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31112031095 and 31112031104.

It is not an unprimeable number, because it can be changed into a prime (31112031421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1152646 + ... + 1179328.

It is an arithmetic number, because the mean of its divisors is an integer number (3920199808).

Almost surely, 2^31112031121 is an apocalyptic number.

It is an amenable number.

31112031121 is a deficient number, since it is larger than the sum of its proper divisors (249567343).

31112031121 is a wasteful number, since it uses less digits than its factorization.

31112031121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35991.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31112031121 its reverse (12113021113), we get a palindrome (43225052234).

The spelling of 31112031121 in words is "thirty-one billion, one hundred twelve million, thirty-one thousand, one hundred twenty-one".