21001141255 has 4 divisors (see below), whose sum is σ = 25201369512. Its totient is φ = 16800913000.

The previous prime is 21001141247. The next prime is 21001141349. The reversal of 21001141255 is 55214110012.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21001141255 - 2³ = 21001141247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2100114121 + ... + 2100114130.

It is an arithmetic number, because the mean of its divisors is an integer number (6300342378).

Almost surely, 2^21001141255 is an apocalyptic number.

21001141255 is a deficient number, since it is larger than the sum of its proper divisors (4200228257).

21001141255 is an equidigital number, since it uses as much as digits as its factorization.

21001141255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200228256.

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 21001141255 its reverse (55214110012), we get a palindrome (76215251267).

The spelling of 21001141255 in words is "twenty-one billion, one million, one hundred forty-one thousand, two hundred fifty-five".