31212101320130 has 64 divisors (see below), whose sum is σ = 56742487296768. Its totient is φ = 12360961716480.

The previous prime is 31212101320121. The next prime is 31212101320133. The reversal of 31212101320130 is 3102310121213.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31212101320133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 410091659 + ... + 410167761.

It is an arithmetic number, because the mean of its divisors is an integer number (886601364012).

Almost surely, 2^{31212101320130} is an apocalyptic number.

31212101320130 is a deficient number, since it is larger than the sum of its proper divisors (25530385976638).

31212101320130 is a wasteful number, since it uses less digits than its factorization.

31212101320130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77291.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31212101320130 its reverse (3102310121213), we get a palindrome (34314411441343).

The spelling of 31212101320130 in words is "thirty-one trillion, two hundred twelve billion, one hundred one million, three hundred twenty thousand, one hundred thirty".