1213162641787 has 2 divisors, whose sum is σ = 1213162641788. Its totient is φ = 1213162641786.

The previous prime is 1213162641781. The next prime is 1213162641811. The reversal of 1213162641787 is 7871462613121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213162641787 - 2¹⁵ = 1213162609019 is a prime.

It is a super-2 number, since 2×1213162641787² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1213162641787.

It is not a weakly prime, because it can be changed into another prime (1213162641781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606581320893 + 606581320894.

It is an arithmetic number, because the mean of its divisors is an integer number (606581320894).

Almost surely, 2^{1213162641787} is an apocalyptic number.

1213162641787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213162641787 is an equidigital number, since it uses as much as digits as its factorization.

1213162641787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 49.

The spelling of 1213162641787 in words is "one trillion, two hundred thirteen billion, one hundred sixty-two million, six hundred forty-one thousand, seven hundred eighty-seven".