31111012 has 6 divisors (see below), whose sum is σ = 54444278. Its totient is φ = 15555504.

The previous prime is 31111009. The next prime is 31111013. The reversal of 31111012 is 21011113.

It can be written as a sum of positive squares in only one way, i.e., 16777216 + 14333796 = 4096^2 + 3786^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31111012.

It is not an unprimeable number, because it can be changed into a prime (31111013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3888873 + ... + 3888880.

Almost surely, 2^31111012 is an apocalyptic number.

It is an amenable number.

31111012 is a deficient number, since it is larger than the sum of its proper divisors (23333266).

31111012 is a wasteful number, since it uses less digits than its factorization.

31111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7777757 (or 7777755 counting only the distinct ones).

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

The square root of 31111012 is about 5577.7246256874. The cubic root of 31111012 is about 314.5125980380.

Adding to 31111012 its reverse (21011113), we get a palindrome (52122125).

The spelling of 31111012 in words is "thirty-one million, one hundred eleven thousand, twelve".