31123022012 has 24 divisors (see below), whose sum is σ = 56230473600. Its totient is φ = 15057319680.

The previous prime is 31123021999. The next prime is 31123022041. The reversal of 31123022012 is 21022032113.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1108208 + ... + 1135944.

It is an arithmetic number, because the mean of its divisors is an integer number (2342936400).

Almost surely, 2^31123022012 is an apocalyptic number.

It is an amenable number.

31123022012 is a deficient number, since it is larger than the sum of its proper divisors (25107451588).

31123022012 is a wasteful number, since it uses less digits than its factorization.

31123022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36821 (or 36819 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31123022012 its reverse (21022032113), we get a palindrome (52145054125).

The spelling of 31123022012 in words is "thirty-one billion, one hundred twenty-three million, twenty-two thousand, twelve".