21244141401400 has 48 divisors (see below), whose sum is σ = 51540134367600. Its totient is φ = 8128193230080.

The previous prime is 21244141401359. The next prime is 21244141401407. The reversal of 21244141401400 is 410414144212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21244141401407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2309141205 + ... + 2309150404.

It is an arithmetic number, because the mean of its divisors is an integer number (1073752799325).

Almost surely, 2^{21244141401400} is an apocalyptic number.

21244141401400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21244141401400 is an abundant number, since it is smaller than the sum of its proper divisors (30295992966200).

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

21244141401400 is a wasteful number, since it uses less digits than its factorization.

21244141401400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4618291648 (or 4618291639 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

Adding to 21244141401400 its reverse (410414144212), we get a palindrome (21654555545612).

The spelling of 21244141401400 in words is "twenty-one trillion, two hundred forty-four billion, one hundred forty-one million, four hundred one thousand, four hundred".