21020143130224 has 80 divisors (see below), whose sum is σ = 46669708947456. Its totient is φ = 8984448864000.

The previous prime is 21020143130171. The next prime is 21020143130227. The reversal of 21020143130224 is 42203134102012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020143130227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66968049 + ... + 67281199.

Almost surely, 2^{21020143130224} is an apocalyptic number.

It is an amenable number.

21020143130224 is an abundant number, since it is smaller than the sum of its proper divisors (25649565817232).

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

21020143130224 is a wasteful number, since it uses less digits than its factorization.

21020143130224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314774 (or 314768 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21020143130224 its reverse (42203134102012), we get a palindrome (63223277232236).

The spelling of 21020143130224 in words is "twenty-one trillion, twenty billion, one hundred forty-three million, one hundred thirty thousand, two hundred twenty-four".