31212103131302 has 16 divisors (see below), whose sum is σ = 47816266479552. Its totient is φ = 15273375149760.

The previous prime is 31212103131281. The next prime is 31212103131383. The reversal of 31212103131302 is 20313130121213.

It is a super-2 number, since 2×31212103131302² (a number of 28 digits) contains 22 as substring.

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, 4592783 + ... + 9138810.

It is an arithmetic number, because the mean of its divisors is an integer number (2988516654972).

Almost surely, 2^{31212103131302} is an apocalyptic number.

31212103131302 is a deficient number, since it is larger than the sum of its proper divisors (16604163348250).

31212103131302 is a wasteful number, since it uses less digits than its factorization.

31212103131302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13755823.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31212103131302 its reverse (20313130121213), we get a palindrome (51525233252515).

The spelling of 31212103131302 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, one hundred thirty-one thousand, three hundred two".