21100014255 has 32 divisors (see below), whose sum is σ = 33945200640. Its totient is φ = 11191783680.

The previous prime is 21100014239. The next prime is 21100014259. The reversal of 21100014255 is 55241000112.

It is not a de Polignac number, because 21100014255 - 2⁴ = 21100014239 is a prime.

It is a super-2 number, since 2×21100014255² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100014259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2155011 + ... + 2164779.

It is an arithmetic number, because the mean of its divisors is an integer number (1060787520).

Almost surely, 2^21100014255 is an apocalyptic number.

21100014255 is a deficient number, since it is larger than the sum of its proper divisors (12845186385).

21100014255 is a wasteful number, since it uses less digits than its factorization.

21100014255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10551.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 21100014255 its reverse (55241000112), we get a palindrome (76341014367).

The spelling of 21100014255 in words is "twenty-one billion, one hundred million, fourteen thousand, two hundred fifty-five".