21421200410 has 16 divisors (see below), whose sum is σ = 38595578112. Its totient is φ = 8560165200.

The previous prime is 21421200401. The next prime is 21421200413. The reversal of 21421200410 is 1400212412.

It is not an unprimeable number, because it can be changed into a prime (21421200413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1028546 + ... + 1049165.

It is an arithmetic number, because the mean of its divisors is an integer number (2412223632).

Almost surely, 2^21421200410 is an apocalyptic number.

21421200410 is a deficient number, since it is larger than the sum of its proper divisors (17174377702).

21421200410 is a wasteful number, since it uses less digits than its factorization.

21421200410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078749.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21421200410 its reverse (1400212412), we get a palindrome (22821412822).

The spelling of 21421200410 in words is "twenty-one billion, four hundred twenty-one million, two hundred thousand, four hundred ten".