1001005011155 has 16 divisors (see below), whose sum is σ = 1272149509824. Its totient is φ = 753529405440.

The previous prime is 1001005011143. The next prime is 1001005011157. The reversal of 1001005011155 is 5511105001001.

It is not a de Polignac number, because 1001005011155 - 2¹² = 1001005007059 is a prime.

It is a super-2 number, since 2×1001005011155² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001005011157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 933167 + ... + 1694936.

It is an arithmetic number, because the mean of its divisors is an integer number (79509344364).

Almost surely, 2^{1001005011155} is an apocalyptic number.

1001005011155 is a deficient number, since it is larger than the sum of its proper divisors (271144498669).

1001005011155 is a wasteful number, since it uses less digits than its factorization.

1001005011155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632606.

The product of its (nonzero) digits is 125, while the sum is 20.

The spelling of 1001005011155 in words is "one trillion, one billion, five million, eleven thousand, one hundred fifty-five".