123102011 has 2 divisors, whose sum is σ = 123102012. Its totient is φ = 123102010.

The previous prime is 123101999. The next prime is 123102029. The reversal of 123102011 is 110201321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123102011 - 2¹⁸ = 122839867 is a prime.

It is a super-2 number, since 2×123102011² = 30308210224488242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123101983 and 123102001.

It is not a weakly prime, because it can be changed into another prime (123102061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61551005 + 61551006.

It is an arithmetic number, because the mean of its divisors is an integer number (61551006).

Almost surely, 2^123102011 is an apocalyptic number.

123102011 is a deficient number, since it is larger than the sum of its proper divisors (1).

123102011 is an equidigital number, since it uses as much as digits as its factorization.

123102011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 123102011 is about 11095.1345643034. The cubic root of 123102011 is about 497.4564304495.

Adding to 123102011 its reverse (110201321), we get a palindrome (233303332).

The spelling of 123102011 in words is "one hundred twenty-three million, one hundred two thousand, eleven".