1212551510117 has 2 divisors, whose sum is σ = 1212551510118. Its totient is φ = 1212551510116.

The previous prime is 1212551510099. The next prime is 1212551510141. The reversal of 1212551510117 is 7110151552121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 980072280196 + 232479229921 = 989986^2 + 482161^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212551510117 - 2¹⁰ = 1212551509093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212551518117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606275755058 + 606275755059.

It is an arithmetic number, because the mean of its divisors is an integer number (606275755059).

Almost surely, 2^{1212551510117} is an apocalyptic number.

It is an amenable number.

1212551510117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212551510117 is an equidigital number, since it uses as much as digits as its factorization.

1212551510117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3500, while the sum is 32.

The spelling of 1212551510117 in words is "one trillion, two hundred twelve billion, five hundred fifty-one million, five hundred ten thousand, one hundred seventeen".