2011203202123 has 4 divisors (see below), whose sum is σ = 2035434566088. Its totient is φ = 1986971838160.

The previous prime is 2011203202111. The next prime is 2011203202133. The reversal of 2011203202123 is 3212023021102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011203202123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2011203202123.

It is not an unprimeable number, because it can be changed into a prime (2011203202103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12115681858 + ... + 12115682023.

It is an arithmetic number, because the mean of its divisors is an integer number (508858641522).

Almost surely, 2^{2011203202123} is an apocalyptic number.

2011203202123 is a deficient number, since it is larger than the sum of its proper divisors (24231363965).

2011203202123 is an equidigital number, since it uses as much as digits as its factorization.

2011203202123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24231363964.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 2011203202123 its reverse (3212023021102), we get a palindrome (5223226223225).

The spelling of 2011203202123 in words is "two trillion, eleven billion, two hundred three million, two hundred two thousand, one hundred twenty-three".