123311801 has 2 divisors, whose sum is σ = 123311802. Its totient is φ = 123311800.

The previous prime is 123311791. The next prime is 123311803. The reversal of 123311801 is 108113321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120472576 + 2839225 = 10976^2 + 1685^2 .

It is a cyclic number.

It is not a de Polignac number, because 123311801 - 2²² = 119117497 is a prime.

Together with 123311803, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123311803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61655900 + 61655901.

It is an arithmetic number, because the mean of its divisors is an integer number (61655901).

Almost surely, 2^123311801 is an apocalyptic number.

It is an amenable number.

123311801 is a deficient number, since it is larger than the sum of its proper divisors (1).

123311801 is an equidigital number, since it uses as much as digits as its factorization.

123311801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 123311801 is about 11104.5846838142. The cubic root of 123311801 is about 497.7388578869.

The spelling of 123311801 in words is "one hundred twenty-three million, three hundred eleven thousand, eight hundred one".