31123311322012 has 96 divisors (see below), whose sum is σ = 70871111897600. Its totient is φ = 11613554226432.

The previous prime is 31123311321989. The next prime is 31123311322021. The reversal of 31123311322012 is 21022311332113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8241978 + ... + 11409505.

Almost surely, 2^{31123311322012} is an apocalyptic number.

It is an amenable number.

31123311322012 is an abundant number, since it is smaller than the sum of its proper divisors (39747800575588).

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

31123311322012 is a wasteful number, since it uses less digits than its factorization.

31123311322012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19651755 (or 19651753 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31123311322012 its reverse (21022311332113), we get a palindrome (52145622654125).

The spelling of 31123311322012 in words is "thirty-one trillion, one hundred twenty-three billion, three hundred eleven million, three hundred twenty-two thousand, twelve".