2011123355 has 16 divisors (see below), whose sum is σ = 2455621920. Its totient is φ = 1580882688.

The previous prime is 2011123337. The next prime is 2011123379. The reversal of 2011123355 is 5533211102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2011123355 - 2¹⁰ = 2011122331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2011123355.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87944 + ... + 108426.

It is an arithmetic number, because the mean of its divisors is an integer number (153476370).

Almost surely, 2^2011123355 is an apocalyptic number.

2011123355 is a deficient number, since it is larger than the sum of its proper divisors (444498565).

2011123355 is a wasteful number, since it uses less digits than its factorization.

2011123355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20830.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 2011123355 is about 44845.5500022020. The cubic root of 2011123355 is about 1262.2524911656.

Adding to 2011123355 its reverse (5533211102), we get a palindrome (7544334457).

The spelling of 2011123355 in words is "two billion, eleven million, one hundred twenty-three thousand, three hundred fifty-five".