123311440203 has 64 divisors (see below), whose sum is σ = 191846645760. Its totient is φ = 69001051392.

The previous prime is 123311440177. The next prime is 123311440271. The reversal of 123311440203 is 302044113321.

It is a happy number.

It is not a de Polignac number, because 123311440203 - 2⁵ = 123311440171 is a prime.

It is a super-2 number, since 2×123311440203² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123311440283) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 225431976 + ... + 225432522.

It is an arithmetic number, because the mean of its divisors is an integer number (2997603840).

Almost surely, 2^123311440203 is an apocalyptic number.

123311440203 is a deficient number, since it is larger than the sum of its proper divisors (68535205557).

123311440203 is a wasteful number, since it uses less digits than its factorization.

123311440203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 123311440203 its reverse (302044113321), we get a palindrome (425355553524).

The spelling of 123311440203 in words is "one hundred twenty-three billion, three hundred eleven million, four hundred forty thousand, two hundred three".