21210301412400 has 120 divisors (see below), whose sum is σ = 67957835965264. Its totient is φ = 5654900736000.

The previous prime is 21210301412383. The next prime is 21210301412401. The reversal of 21210301412400 is 421410301212.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (21210301412401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3920412 + ... + 7601988.

Almost surely, 2^{21210301412400} is an apocalyptic number.

21210301412400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210301412400 is an abundant number, since it is smaller than the sum of its proper divisors (46747534552864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21210301412400 is a wasteful number, since it uses less digits than its factorization.

21210301412400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686399 (or 3686388 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21210301412400 its reverse (421410301212), we get a palindrome (21631711713612).

The spelling of 21210301412400 in words is "twenty-one trillion, two hundred ten billion, three hundred one million, four hundred twelve thousand, four hundred".