21421132010 has 8 divisors (see below), whose sum is σ = 38558037636. Its totient is φ = 8568452800.

The previous prime is 21421131997. The next prime is 21421132021. The reversal of 21421132010 is 1023112412.

It can be written as a sum of positive squares in 2 ways, for example, as 18888928969 + 2532203041 = 137437^2 + 50321^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21421132010.

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, 1071056591 + ... + 1071056610.

Almost surely, 2^21421132010 is an apocalyptic number.

21421132010 is a deficient number, since it is larger than the sum of its proper divisors (17136905626).

21421132010 is a wasteful number, since it uses less digits than its factorization.

21421132010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142113208.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21421132010 its reverse (1023112412), we get a palindrome (22444244422).

The spelling of 21421132010 in words is "twenty-one billion, four hundred twenty-one million, one hundred thirty-two thousand, ten".