21314121400 has 96 divisors (see below), whose sum is σ = 58218930000. Its totient is φ = 7154380800.

The previous prime is 21314121377. The next prime is 21314121419. The reversal of 21314121400 is 412141312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 344025 + ... + 401224.

Almost surely, 2^21314121400 is an apocalyptic number.

21314121400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21314121400 is an abundant number, since it is smaller than the sum of its proper divisors (36904808600).

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

21314121400 is a wasteful number, since it uses less digits than its factorization.

21314121400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745289 (or 745280 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21314121400 its reverse (412141312), we get a palindrome (21726262712).

The spelling of 21314121400 in words is "twenty-one billion, three hundred fourteen million, one hundred twenty-one thousand, four hundred".