21400421410012 has 48 divisors (see below), whose sum is σ = 42425034936480. Its totient is φ = 9384339456000.

The previous prime is 21400421409989. The next prime is 21400421410033. The reversal of 21400421410012 is 21001412400412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135689989 + ... + 135847612.

It is an arithmetic number, because the mean of its divisors is an integer number (883854894510).

Almost surely, 2^{21400421410012} is an apocalyptic number.

It is an amenable number.

21400421410012 is a deficient number, since it is larger than the sum of its proper divisors (21024613526468).

21400421410012 is a wasteful number, since it uses less digits than its factorization.

21400421410012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271537702 (or 271537700 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21400421410012 its reverse (21001412400412), we get a palindrome (42401833810424).

The spelling of 21400421410012 in words is "twenty-one trillion, four hundred billion, four hundred twenty-one million, four hundred ten thousand, twelve".