21430122255 has 24 divisors (see below), whose sum is σ = 37165800672. Its totient is φ = 11423166144.

The previous prime is 21430122227. The next prime is 21430122313. The reversal of 21430122255 is 55222103412.

21430122255 is a `hidden beast` number, since 2 + 1 + 430 + 1 + 2 + 225 + 5 = 666.

It is not a de Polignac number, because 21430122255 - 2⁹ = 21430121743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45804 + ... + 212033.

It is an arithmetic number, because the mean of its divisors is an integer number (1548575028).

Almost surely, 2^21430122255 is an apocalyptic number.

21430122255 is a deficient number, since it is larger than the sum of its proper divisors (15735678417).

21430122255 is a wasteful number, since it uses less digits than its factorization.

21430122255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259695 (or 259692 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 21430122255 its reverse (55222103412), we get a palindrome (76652225667).

The spelling of 21430122255 in words is "twenty-one billion, four hundred thirty million, one hundred twenty-two thousand, two hundred fifty-five".