123101213240 has 32 divisors (see below), whose sum is σ = 277013034000. Its totient is φ = 49234209024.

The previous prime is 123101213239. The next prime is 123101213269. The reversal of 123101213240 is 42312101321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128231 + ... + 512489.

Almost surely, 2^123101213240 is an apocalyptic number.

123101213240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123101213240 is an abundant number, since it is smaller than the sum of its proper divisors (153911820760).

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

123101213240 is a wasteful number, since it uses less digits than its factorization.

123101213240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392279 (or 392275 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 123101213240 its reverse (42312101321), we get a palindrome (165413314561).

The spelling of 123101213240 in words is "one hundred twenty-three billion, one hundred one million, two hundred thirteen thousand, two hundred forty".