122400405555 has 32 divisors (see below), whose sum is σ = 199900742400. Its totient is φ = 63935083392.

The previous prime is 122400405541. The next prime is 122400405613. The reversal of 122400405555 is 555504004221.

It is not a de Polignac number, because 122400405555 - 2⁴ = 122400405539 is a prime.

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, 19009 + ... + 495138.

It is an arithmetic number, because the mean of its divisors is an integer number (6246898200).

Almost surely, 2^122400405555 is an apocalyptic number.

122400405555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

122400405555 is a deficient number, since it is larger than the sum of its proper divisors (77500336845).

122400405555 is a wasteful number, since it uses less digits than its factorization.

122400405555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514483.

The product of its (nonzero) digits is 40000, while the sum is 33.

Adding to 122400405555 its reverse (555504004221), we get a palindrome (677904409776).

The spelling of 122400405555 in words is "one hundred twenty-two billion, four hundred million, four hundred five thousand, five hundred fifty-five".