21421512041 has 8 divisors (see below), whose sum is σ = 22162019520. Its totient is φ = 20681126928.

The previous prime is 21421511999. The next prime is 21421512043. The reversal of 21421512041 is 14021512412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21421512041 - 2²² = 21417317737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21421511998 and 21421512016.

It is not an unprimeable number, because it can be changed into a prime (21421512043) 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 7 ways as a sum of consecutive naturals, for example, 458150 + ... + 502736.

It is an arithmetic number, because the mean of its divisors is an integer number (2770252440).

Almost surely, 2^21421512041 is an apocalyptic number.

It is an amenable number.

21421512041 is a deficient number, since it is larger than the sum of its proper divisors (740507479).

21421512041 is a wasteful number, since it uses less digits than its factorization.

21421512041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61183.

The product of its (nonzero) digits is 640, while the sum is 23.

The spelling of 21421512041 in words is "twenty-one billion, four hundred twenty-one million, five hundred twelve thousand, forty-one".