2011312123 has 2 divisors, whose sum is σ = 2011312124. Its totient is φ = 2011312122.

The previous prime is 2011312087. The next prime is 2011312129. The reversal of 2011312123 is 3212131102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011312123 - 2²¹ = 2009214971 is a prime.

It is a super-2 number, since 2×2011312123² = 8090752912253534258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2011312097 and 2011312106.

It is not a weakly prime, because it can be changed into another prime (2011312129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005656061 + 1005656062.

It is an arithmetic number, because the mean of its divisors is an integer number (1005656062).

Almost surely, 2^2011312123 is an apocalyptic number.

2011312123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011312123 is an equidigital number, since it uses as much as digits as its factorization.

2011312123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2011312123 is about 44847.6545986521. The cubic root of 2011312123 is about 1262.2919824318.

Adding to 2011312123 its reverse (3212131102), we get a palindrome (5223443225).

The spelling of 2011312123 in words is "two billion, eleven million, three hundred twelve thousand, one hundred twenty-three".