21141152005 has 4 divisors (see below), whose sum is σ = 25369382412. Its totient is φ = 16912921600.

The previous prime is 21141151991. The next prime is 21141152051. The reversal of 21141152005 is 50025114112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16305757636 + 4835394369 = 127694^2 + 69537^2 .

It is not a de Polignac number, because 21141152005 - 2¹⁷ = 21141020933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2114115196 + ... + 2114115205.

It is an arithmetic number, because the mean of its divisors is an integer number (6342345603).

Almost surely, 2^21141152005 is an apocalyptic number.

It is an amenable number.

21141152005 is a deficient number, since it is larger than the sum of its proper divisors (4228230407).

21141152005 is an equidigital number, since it uses as much as digits as its factorization.

21141152005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228230406.

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

Adding to 21141152005 its reverse (50025114112), we get a palindrome (71166266117).

The spelling of 21141152005 in words is "twenty-one billion, one hundred forty-one million, one hundred fifty-two thousand, five".