123233209861 has 2 divisors, whose sum is σ = 123233209862. Its totient is φ = 123233209860.

The previous prime is 123233209837. The next prime is 123233209877. The reversal of 123233209861 is 168902332321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90056408836 + 33176801025 = 300094^2 + 182145^2 .

It is a cyclic number.

It is not a de Polignac number, because 123233209861 - 2⁵ = 123233209829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123233209811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61616604930 + 61616604931.

It is an arithmetic number, because the mean of its divisors is an integer number (61616604931).

Almost surely, 2^123233209861 is an apocalyptic number.

It is an amenable number.

123233209861 is a deficient number, since it is larger than the sum of its proper divisors (1).

123233209861 is an equidigital number, since it uses as much as digits as its factorization.

123233209861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 123233209861 in words is "one hundred twenty-three billion, two hundred thirty-three million, two hundred nine thousand, eight hundred sixty-one".