123340204420 has 12 divisors (see below), whose sum is σ = 259014429324. Its totient is φ = 49336081760.

The previous prime is 123340204417. The next prime is 123340204423. The reversal of 123340204420 is 24402043321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123340204417) and next prime (123340204423).

It can be written as a sum of positive squares in 2 ways, for example, as 26254369024 + 97085835396 = 162032^2 + 311586^2 .

It is not an unprimeable number, because it can be changed into a prime (123340204423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3083505091 + ... + 3083505130.

It is an arithmetic number, because the mean of its divisors is an integer number (21584535777).

Almost surely, 2^123340204420 is an apocalyptic number.

123340204420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123340204420 is an abundant number, since it is smaller than the sum of its proper divisors (135674224904).

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

123340204420 is a wasteful number, since it uses less digits than its factorization.

123340204420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6167010230 (or 6167010228 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 123340204420 its reverse (24402043321), we get a palindrome (147742247741).

The spelling of 123340204420 in words is "one hundred twenty-three billion, three hundred forty million, two hundred four thousand, four hundred twenty".