1005551105111 has 8 divisors (see below), whose sum is σ = 1153262047104. Its totient is φ = 858855359160.

The previous prime is 1005551105057. The next prime is 1005551105123. The reversal of 1005551105111 is 1115011555001.

1005551105111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005551105111 is a prime.

It is a super-2 number, since 2×1005551105111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005551102111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253796885 + ... + 253800846.

It is an arithmetic number, because the mean of its divisors is an integer number (144157755888).

Almost surely, 2^{1005551105111} is an apocalyptic number.

1005551105111 is a deficient number, since it is larger than the sum of its proper divisors (147710941993).

1005551105111 is an equidigital number, since it uses as much as digits as its factorization.

1005551105111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507598021.

The product of its (nonzero) digits is 625, while the sum is 26.

The spelling of 1005551105111 in words is "one trillion, five billion, five hundred fifty-one million, one hundred five thousand, one hundred eleven".