21441234212400 has 120 divisors (see below), whose sum is σ = 68685815007040. Its totient is φ = 5717463102720.

The previous prime is 21441234212383. The next prime is 21441234212407. The reversal of 21441234212400 is 421243214412.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (21441234212407) 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, 35870379 + ... + 36463221.

Almost surely, 2^{21441234212400} is an apocalyptic number.

21441234212400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21441234212400 is an abundant number, since it is smaller than the sum of its proper divisors (47244580794640).

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

21441234212400 is a wasteful number, since it uses less digits than its factorization.

21441234212400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623003 (or 622992 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 21441234212400 its reverse (421243214412), we get a palindrome (21862477426812).

The spelling of 21441234212400 in words is "twenty-one trillion, four hundred forty-one billion, two hundred thirty-four million, two hundred twelve thousand, four hundred".