123020311 has 2 divisors, whose sum is σ = 123020312. Its totient is φ = 123020310.

The previous prime is 123020309. The next prime is 123020327. The reversal of 123020311 is 113020321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123020311 - 2¹ = 123020309 is a prime.

Together with 123020309, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 123020291 and 123020300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123020341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61510155 + 61510156.

It is an arithmetic number, because the mean of its divisors is an integer number (61510156).

Almost surely, 2^123020311 is an apocalyptic number.

123020311 is a deficient number, since it is larger than the sum of its proper divisors (1).

123020311 is an equidigital number, since it uses as much as digits as its factorization.

123020311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 123020311 is about 11091.4521592080. The cubic root of 123020311 is about 497.3463559283.

Adding to 123020311 its reverse (113020321), we get a palindrome (236040632).

The spelling of 123020311 in words is "one hundred twenty-three million, twenty thousand, three hundred eleven".