31212113130302 has 16 divisors (see below), whose sum is σ = 52046005022592. Its totient is φ = 13940894201760.

The previous prime is 31212113130293. The next prime is 31212113130307. The reversal of 31212113130302 is 20303131121213.

It is a super-2 number, since 2×31212113130302² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212113130307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19362352253 + ... + 19362353864.

It is an arithmetic number, because the mean of its divisors is an integer number (3252875313912).

Almost surely, 2^{31212113130302} is an apocalyptic number.

31212113130302 is a deficient number, since it is larger than the sum of its proper divisors (20833891892290).

31212113130302 is a wasteful number, since it uses less digits than its factorization.

31212113130302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38724706163.

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

Adding to 31212113130302 its reverse (20303131121213), we get a palindrome (51515244251515).

The spelling of 31212113130302 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirteen million, one hundred thirty thousand, three hundred two".