21421441134030 has 256 divisors, whose sum is σ = 64687827861504. Its totient is φ = 4427099504640.

The previous prime is 21421441133993. The next prime is 21421441134031. The reversal of 21421441134030 is 3043114412412.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21421441134031) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14455362 + ... + 15868218.

It is an arithmetic number, because the mean of its divisors is an integer number (252686827584).

Almost surely, 2^{21421441134030} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21421441134030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32343913930752).

21421441134030 is an abundant number, since it is smaller than the sum of its proper divisors (43266386727474).

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

21421441134030 is a wasteful number, since it uses less digits than its factorization.

21421441134030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413059.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 21421441134030 its reverse (3043114412412), we get a palindrome (24464555546442).

The spelling of 21421441134030 in words is "twenty-one trillion, four hundred twenty-one billion, four hundred forty-one million, one hundred thirty-four thousand, thirty".