21013000132122 has 48 divisors (see below), whose sum is σ = 46305611537640. Its totient is φ = 6884880768000.

The previous prime is 21013000132099. The next prime is 21013000132141. The reversal of 21013000132122 is 22123100031012.

21013000132122 is a `hidden beast` number, since 21 + 0 + 1 + 300 + 0 + 1 + 321 + 22 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8257237878681 + 12755762253441 = 2873541^2 + 3571521^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21013000132095 and 21013000132104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4791379 + ... + 8061222.

Almost surely, 2^{21013000132122} is an apocalyptic number.

21013000132122 is an abundant number, since it is smaller than the sum of its proper divisors (25292611405518).

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

21013000132122 is a wasteful number, since it uses less digits than its factorization.

21013000132122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12854159 (or 12854156 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21013000132122 its reverse (22123100031012), we get a palindrome (43136100163134).

The spelling of 21013000132122 in words is "twenty-one trillion, thirteen billion, one hundred thirty-two thousand, one hundred twenty-two".