2011231402155 has 12 divisors (see below), whose sum is σ = 3486134430480. Its totient is φ = 1072656747792.

The previous prime is 2011231402151. The next prime is 2011231402181. The reversal of 2011231402155 is 5512041321102.

It is a happy number.

2011231402155 is a `hidden beast` number, since 2 + 0 + 11 + 231 + 402 + 15 + 5 = 666.

It is not a de Polignac number, because 2011231402155 - 2² = 2011231402151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2011231402151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22347015535 + ... + 22347015624.

It is an arithmetic number, because the mean of its divisors is an integer number (290511202540).

Almost surely, 2^{2011231402155} is an apocalyptic number.

2011231402155 is a deficient number, since it is larger than the sum of its proper divisors (1474903028325).

2011231402155 is a wasteful number, since it uses less digits than its factorization.

2011231402155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44694031170 (or 44694031167 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 2011231402155 its reverse (5512041321102), we get a palindrome (7523272723257).

The spelling of 2011231402155 in words is "two trillion, eleven billion, two hundred thirty-one million, four hundred two thousand, one hundred fifty-five".