1155221605007 has 2 divisors, whose sum is σ = 1155221605008. Its totient is φ = 1155221605006.

The previous prime is 1155221604997. The next prime is 1155221605009. The reversal of 1155221605007 is 7005061225511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155221605007 - 2¹⁴ = 1155221588623 is a prime.

Together with 1155221605009, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

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, 577610802503 + 577610802504.

It is an arithmetic number, because the mean of its divisors is an integer number (577610802504).

Almost surely, 2^{1155221605007} is an apocalyptic number.

1155221605007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155221605007 is an equidigital number, since it uses as much as digits as its factorization.

1155221605007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 35.

The spelling of 1155221605007 in words is "one trillion, one hundred fifty-five billion, two hundred twenty-one million, six hundred five thousand, seven".