31212103200247 has 2 divisors, whose sum is σ = 31212103200248. Its totient is φ = 31212103200246.

The previous prime is 31212103200211. The next prime is 31212103200293. The reversal of 31212103200247 is 74200230121213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31212103200247 is a prime.

It is a super-2 number, since 2×31212103200247² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31212103200647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606051600123 + 15606051600124.

It is an arithmetic number, because the mean of its divisors is an integer number (15606051600124).

Almost surely, 2^{31212103200247} is an apocalyptic number.

31212103200247 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212103200247 is an equidigital number, since it uses as much as digits as its factorization.

31212103200247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 31212103200247 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, two hundred thousand, two hundred forty-seven".