21523211132130 has 24 divisors (see below), whose sum is σ = 55960348943772. Its totient is φ = 5739522968544.

The previous prime is 21523211132057. The next prime is 21523211132131. The reversal of 21523211132130 is 3123111232512.

21523211132130 is a `hidden beast` number, since 2 + 1 + 5 + 2 + 321 + 11 + 321 + 3 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20640966092289 + 882245039841 = 4543233^2 + 939279^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21523211132094 and 21523211132103.

It is not an unprimeable number, because it can be changed into a prime (21523211132131) 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, 119573395089 + ... + 119573395268.

Almost surely, 2^{21523211132130} is an apocalyptic number.

21523211132130 is an abundant number, since it is smaller than the sum of its proper divisors (34437137811642).

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

21523211132130 is a wasteful number, since it uses less digits than its factorization.

21523211132130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239146790370 (or 239146790367 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 21523211132130 its reverse (3123111232512), we get a palindrome (24646322364642).

The spelling of 21523211132130 in words is "twenty-one trillion, five hundred twenty-three billion, two hundred eleven million, one hundred thirty-two thousand, one hundred thirty".