2011123413 has 24 divisors (see below), whose sum is σ = 3159407160. Its totient is φ = 1225353600.

The previous prime is 2011123403. The next prime is 2011123441. The reversal of 2011123413 is 3143211102.

It can be written as a sum of positive squares in 4 ways, for example, as 253669329 + 1757454084 = 15927^2 + 41922^2 .

It is not a de Polignac number, because 2011123413 - 2⁸ = 2011123157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011123403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73278 + ... + 96911.

It is an arithmetic number, because the mean of its divisors is an integer number (131641965).

Almost surely, 2^2011123413 is an apocalyptic number.

It is an amenable number.

2011123413 is a deficient number, since it is larger than the sum of its proper divisors (1148283747).

2011123413 is a wasteful number, since it uses less digits than its factorization.

2011123413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170309 (or 170306 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2011123413 is about 44845.5506488659. The cubic root of 2011123413 is about 1262.2525032998.

Adding to 2011123413 its reverse (3143211102), we get a palindrome (5154334515).

The spelling of 2011123413 in words is "two billion, eleven million, one hundred twenty-three thousand, four hundred thirteen".