21050102442055 has 16 divisors (see below), whose sum is σ = 25519189825440. Its totient is φ = 16667654530432.

The previous prime is 21050102442029. The next prime is 21050102442097. The reversal of 21050102442055 is 55024420105012.

It is a cyclic number.

It is not a de Polignac number, because 21050102442055 - 2¹¹ = 21050102440007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17146084 + ... + 18332713.

It is an arithmetic number, because the mean of its divisors is an integer number (1594949364090).

Almost surely, 2^{21050102442055} is an apocalyptic number.

21050102442055 is a deficient number, since it is larger than the sum of its proper divisors (4469087383385).

21050102442055 is a wasteful number, since it uses less digits than its factorization.

21050102442055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35480018.

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 21050102442055 its reverse (55024420105012), we get a palindrome (76074522547067).

The spelling of 21050102442055 in words is "twenty-one trillion, fifty billion, one hundred two million, four hundred forty-two thousand, fifty-five".