123211440042 has 16 divisors (see below), whose sum is σ = 254372005632. Its totient is φ = 39745625760.

The previous prime is 123211440031. The next prime is 123211440083. The reversal of 123211440042 is 240044112321.

It is a junction number, because it is equal to n+sod(n) for n = 123211439994 and 123211440021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331213363 + ... + 331213734.

It is an arithmetic number, because the mean of its divisors is an integer number (15898250352).

Almost surely, 2^123211440042 is an apocalyptic number.

123211440042 is an abundant number, since it is smaller than the sum of its proper divisors (131160565590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123211440042 is a wasteful number, since it uses less digits than its factorization.

123211440042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662427133.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 123211440042 its reverse (240044112321), we get a palindrome (363255552363).

The spelling of 123211440042 in words is "one hundred twenty-three billion, two hundred eleven million, four hundred forty thousand, forty-two".