2011510012155 has 128 divisors (see below), whose sum is σ = 3801052569600. Its totient is φ = 889340995584.

The previous prime is 2011510012123. The next prime is 2011510012159. The reversal of 2011510012155 is 5512100151102.

It is not a de Polignac number, because 2011510012155 - 2⁵ = 2011510012123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2011510012159) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 209244129 + ... + 209253741.

It is an arithmetic number, because the mean of its divisors is an integer number (29695723200).

Almost surely, 2^{2011510012155} is an apocalyptic number.

2011510012155 is a deficient number, since it is larger than the sum of its proper divisors (1789542557445).

2011510012155 is a wasteful number, since it uses less digits than its factorization.

2011510012155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10173.

The product of its (nonzero) digits is 500, while the sum is 24.

Adding to 2011510012155 its reverse (5512100151102), we get a palindrome (7523610163257).

The spelling of 2011510012155 in words is "two trillion, eleven billion, five hundred ten million, twelve thousand, one hundred fifty-five".