31121106 has 8 divisors (see below), whose sum is σ = 62242224. Its totient is φ = 10373700.

The previous prime is 31121087. The next prime is 31121137. The reversal of 31121106 is 60112113.

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

31121106 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2593420 + ... + 2593431.

It is an arithmetic number, because the mean of its divisors is an integer number (7780278).

Almost surely, 2^31121106 is an apocalyptic number.

31121106 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31121106 is a wasteful number, since it uses less digits than its factorization.

31121106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5186856.

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

The square root of 31121106 is about 5578.6294015645. The cubic root of 31121106 is about 314.5466090058.

Adding to 31121106 its reverse (60112113), we get a palindrome (91233219).

The spelling of 31121106 in words is "thirty-one million, one hundred twenty-one thousand, one hundred six".