123021234340 has 24 divisors (see below), whose sum is σ = 261247344120. Its totient is φ = 48655588608.

The previous prime is 123021234319. The next prime is 123021234403. The reversal of 123021234340 is 43432120321.

It can be written as a sum of positive squares in 4 ways, for example, as 4931410176 + 118089824164 = 70224^2 + 343642^2 .

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, 34554747 + ... + 34558306.

It is an arithmetic number, because the mean of its divisors is an integer number (10885306005).

Almost surely, 2^123021234340 is an apocalyptic number.

123021234340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123021234340 is an abundant number, since it is smaller than the sum of its proper divisors (138226109780).

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

123021234340 is a wasteful number, since it uses less digits than its factorization.

123021234340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69113151 (or 69113149 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 123021234340 its reverse (43432120321), we get a palindrome (166453354661).

The spelling of 123021234340 in words is "one hundred twenty-three billion, twenty-one million, two hundred thirty-four thousand, three hundred forty".