123371320340 has 24 divisors (see below), whose sum is σ = 268013559240. Its totient is φ = 47646854528.

The previous prime is 123371320297. The next prime is 123371320363. The reversal of 123371320340 is 43023173321.

It can be written as a sum of positive squares in 4 ways, for example, as 11482408336 + 111888912004 = 107156^2 + 334498^2 .

It is a super-3 number, since 3×123371320340³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

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, 106354007 + ... + 106355166.

It is an arithmetic number, because the mean of its divisors is an integer number (11167231635).

Almost surely, 2^123371320340 is an apocalyptic number.

123371320340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123371320340 is an abundant number, since it is smaller than the sum of its proper divisors (144642238900).

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

123371320340 is a wasteful number, since it uses less digits than its factorization.

123371320340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212709211 (or 212709209 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 29.

Adding to 123371320340 its reverse (43023173321), we get a palindrome (166394493661).

The spelling of 123371320340 in words is "one hundred twenty-three billion, three hundred seventy-one million, three hundred twenty thousand, three hundred forty".