2111311311203 has 4 divisors (see below), whose sum is σ = 2112113179128. Its totient is φ = 2110509443280.

The previous prime is 2111311311181. The next prime is 2111311311209. The reversal of 2111311311203 is 3021131131112.

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 2111311311203 - 2⁶ = 2111311311139 is a prime.

It is a super-2 number, since 2×2111311311203² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111311311209) 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, 400930013 + ... + 400935278.

It is an arithmetic number, because the mean of its divisors is an integer number (528028294782).

Almost surely, 2^{2111311311203} is an apocalyptic number.

2111311311203 is a deficient number, since it is larger than the sum of its proper divisors (801867925).

2111311311203 is an equidigital number, since it uses as much as digits as its factorization.

2111311311203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801867924.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 2111311311203 its reverse (3021131131112), we get a palindrome (5132442442315).

The spelling of 2111311311203 in words is "two trillion, one hundred eleven billion, three hundred eleven million, three hundred eleven thousand, two hundred three".