21421411012 has 12 divisors (see below), whose sum is σ = 37488992940. Its totient is φ = 10710270176.

The previous prime is 21421411001. The next prime is 21421411087. The reversal of 21421411012 is 21011412412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14386563136 + 7034847876 = 119944^2 + 83874^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18414 + ... + 207802.

It is an arithmetic number, because the mean of its divisors is an integer number (3124082745).

Almost surely, 2^21421411012 is an apocalyptic number.

It is an amenable number.

21421411012 is a deficient number, since it is larger than the sum of its proper divisors (16067581928).

21421411012 is a wasteful number, since it uses less digits than its factorization.

21421411012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217670 (or 217668 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21421411012 its reverse (21011412412), we get a palindrome (42432823424).

The spelling of 21421411012 in words is "twenty-one billion, four hundred twenty-one million, four hundred eleven thousand, twelve".