2011203011123 has 4 divisors (see below), whose sum is σ = 2011284888408. Its totient is φ = 2011121133840.

The previous prime is 2011203011119. The next prime is 2011203011161. The reversal of 2011203011123 is 3211103021102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2011203011123 - 2² = 2011203011119 is a prime.

It is a super-3 number, since 3×2011203011123³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011203011113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40901786 + ... + 40950927.

It is an arithmetic number, because the mean of its divisors is an integer number (502821222102).

Almost surely, 2^{2011203011123} is an apocalyptic number.

2011203011123 is a deficient number, since it is larger than the sum of its proper divisors (81877285).

2011203011123 is an equidigital number, since it uses as much as digits as its factorization.

2011203011123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81877284.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 2011203011123 its reverse (3211103021102), we get a palindrome (5222306032225).

The spelling of 2011203011123 in words is "two trillion, eleven billion, two hundred three million, eleven thousand, one hundred twenty-three".