123311440306 has 4 divisors (see below), whose sum is σ = 184967160462. Its totient is φ = 61655720152.

The previous prime is 123311440283. The next prime is 123311440309. The reversal of 123311440306 is 603044113321.

123311440306 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 113238307081 + 10073133225 = 336509^2 + 100365^2 .

It is a super-2 number, since 2×123311440306² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123311440309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30827860075 + ... + 30827860078.

Almost surely, 2^123311440306 is an apocalyptic number.

123311440306 is a deficient number, since it is larger than the sum of its proper divisors (61655720156).

123311440306 is an equidigital number, since it uses as much as digits as its factorization.

123311440306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61655720155.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 123311440306 its reverse (603044113321), we get a palindrome (726355553627).

The spelling of 123311440306 in words is "one hundred twenty-three billion, three hundred eleven million, four hundred forty thousand, three hundred six".