122420512323405 has 32 divisors (see below), whose sum is σ = 217732468867200. Its totient is φ = 65262139151616.

The previous prime is 122420512323397. The next prime is 122420512323433. The reversal of 122420512323405 is 504323215024221.

122420512323405 is a `hidden beast` number, since 1 + 2 + 2 + 4 + 205 + 1 + 23 + 23 + 405 = 666.

It is not a de Polignac number, because 122420512323405 - 2³ = 122420512323397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122420512323405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199698060 + ... + 200310149.

It is an arithmetic number, because the mean of its divisors is an integer number (6804139652100).

Almost surely, 2^{122420512323405} is an apocalyptic number.

122420512323405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122420512323405 is a deficient number, since it is larger than the sum of its proper divisors (95311956543795).

122420512323405 is a wasteful number, since it uses less digits than its factorization.

122420512323405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400010490 (or 400010484 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 122420512323405 its reverse (504323215024221), we get a palindrome (626743727347626).

The spelling of 122420512323405 in words is "one hundred twenty-two trillion, four hundred twenty billion, five hundred twelve million, three hundred twenty-three thousand, four hundred five".