2123231111011 has 2 divisors, whose sum is σ = 2123231111012. Its totient is φ = 2123231111010.

The previous prime is 2123231111003. The next prime is 2123231111039. The reversal of 2123231111011 is 1101111323212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2123231111011 - 2³ = 2123231111003 is a prime.

It is a super-2 number, since 2×2123231111011² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2123231111011.

It is not a weakly prime, because it can be changed into another prime (2123231111041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061615555505 + 1061615555506.

It is an arithmetic number, because the mean of its divisors is an integer number (1061615555506).

Almost surely, 2^{2123231111011} is an apocalyptic number.

2123231111011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123231111011 is an equidigital number, since it uses as much as digits as its factorization.

2123231111011 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 19.

Adding to 2123231111011 its reverse (1101111323212), we get a palindrome (3224342434223).

The spelling of 2123231111011 in words is "two trillion, one hundred twenty-three billion, two hundred thirty-one million, one hundred eleven thousand, eleven".