31320142012 has 24 divisors (see below), whose sum is σ = 55688910480. Its totient is φ = 15410693760.

The previous prime is 31320142003. The next prime is 31320142019. The reversal of 31320142012 is 21024102313.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320142019) by changing a digit.

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, 133363 + ... + 283594.

It is an arithmetic number, because the mean of its divisors is an integer number (2320371270).

Almost surely, 2^31320142012 is an apocalyptic number.

It is an amenable number.

31320142012 is a deficient number, since it is larger than the sum of its proper divisors (24368768468).

31320142012 is a wasteful number, since it uses less digits than its factorization.

31320142012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417261 (or 417259 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31320142012 its reverse (21024102313), we get a palindrome (52344244325).

The spelling of 31320142012 in words is "thirty-one billion, three hundred twenty million, one hundred forty-two thousand, twelve".