31004321213 has 2 divisors, whose sum is σ = 31004321214. Its totient is φ = 31004321212.

The previous prime is 31004321207. The next prime is 31004321233. The reversal of 31004321213 is 31212340013.

It is an a-pointer prime, because the next prime (31004321233) can be obtained adding 31004321213 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26373110404 + 4631210809 = 162398^2 + 68053^2 .

It is a cyclic number.

It is not a de Polignac number, because 31004321213 - 2¹⁸ = 31004059069 is a prime.

It is a super-2 number, since 2×31004321213² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31004321203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15502160606 + 15502160607.

It is an arithmetic number, because the mean of its divisors is an integer number (15502160607).

Almost surely, 2^31004321213 is an apocalyptic number.

It is an amenable number.

31004321213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31004321213 is an equidigital number, since it uses as much as digits as its factorization.

31004321213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31004321213 its reverse (31212340013), we get a palindrome (62216661226).

The spelling of 31004321213 in words is "thirty-one billion, four million, three hundred twenty-one thousand, two hundred thirteen".