21301213133144 has 64 divisors (see below), whose sum is σ = 46718247459840. Its totient is φ = 8914635636480.

The previous prime is 21301213133119. The next prime is 21301213133203. The reversal of 21301213133144 is 44133131210312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8935409 + ... + 11065439.

It is an arithmetic number, because the mean of its divisors is an integer number (729972616560).

Almost surely, 2^{21301213133144} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21301213133144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23359123729920).

21301213133144 is an abundant number, since it is smaller than the sum of its proper divisors (25417034326696).

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

21301213133144 is a wasteful number, since it uses less digits than its factorization.

21301213133144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134240 (or 2134236 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 21301213133144 its reverse (44133131210312), we get a palindrome (65434344343456).

The spelling of 21301213133144 in words is "twenty-one trillion, three hundred one billion, two hundred thirteen million, one hundred thirty-three thousand, one hundred forty-four".