1155221605019 has 2 divisors, whose sum is σ = 1155221605020. Its totient is φ = 1155221605018.

The previous prime is 1155221605009. The next prime is 1155221605049. The reversal of 1155221605019 is 9105061225511.

It is a weak prime.

It is an emirp because it is prime and its reverse (9105061225511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155221605019 is a prime.

It is a super-2 number, since 2×1155221605019² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1155221605009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577610802509 + 577610802510.

It is an arithmetic number, because the mean of its divisors is an integer number (577610802510).

Almost surely, 2^{1155221605019} is an apocalyptic number.

1155221605019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155221605019 is an equidigital number, since it uses as much as digits as its factorization.

1155221605019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 1155221605019 in words is "one trillion, one hundred fifty-five billion, two hundred twenty-one million, six hundred five thousand, nineteen".