212421103131400 has 384 divisors, whose sum is σ = 524785931550720. Its totient is φ = 79832448000000.

The previous prime is 212421103131373. The next prime is 212421103131407. The reversal of 212421103131400 is 4131301124212.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (212421103131407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 81045822090 + ... + 81045824710.

It is an arithmetic number, because the mean of its divisors is an integer number (1366630030080).

Almost surely, 2^{212421103131400} is an apocalyptic number.

212421103131400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212421103131400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262392965775360).

212421103131400 is an abundant number, since it is smaller than the sum of its proper divisors (312364828419320).

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

212421103131400 is a wasteful number, since it uses less digits than its factorization.

212421103131400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137 (or 4128 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 212421103131400 its reverse (4131301124212), we get a palindrome (216552404255612).

The spelling of 212421103131400 in words is "two hundred twelve trillion, four hundred twenty-one billion, one hundred three million, one hundred thirty-one thousand, four hundred".