3121000003217 has 2 divisors, whose sum is σ = 3121000003218. Its totient is φ = 3121000003216.

The previous prime is 3121000003183. The next prime is 3121000003309. The reversal of 3121000003217 is 7123000001213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2878991104081 + 242008899136 = 1696759^2 + 491944^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121000003217 - 2¹² = 3120999999121 is a prime.

It is not a weakly prime, because it can be changed into another prime (3121000003717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560500001608 + 1560500001609.

It is an arithmetic number, because the mean of its divisors is an integer number (1560500001609).

Almost surely, 2^{3121000003217} is an apocalyptic number.

It is an amenable number.

3121000003217 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121000003217 is an equidigital number, since it uses as much as digits as its factorization.

3121000003217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

The spelling of 3121000003217 in words is "three trillion, one hundred twenty-one billion, three thousand, two hundred seventeen".