21321311121030 has 64 divisors (see below), whose sum is σ = 51204224268288. Its totient is φ = 5682008736000.

The previous prime is 21321311120953. The next prime is 21321311121037. The reversal of 21321311121030 is 3012111312312.

It is a junction number, because it is equal to n+sod(n) for n = 21321311120988 and 21321311121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321311121037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365105514 + ... + 365163906.

It is an arithmetic number, because the mean of its divisors is an integer number (800066004192).

Almost surely, 2^{21321311121030} is an apocalyptic number.

21321311121030 is an abundant number, since it is smaller than the sum of its proper divisors (29882913147258).

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

21321311121030 is a wasteful number, since it uses less digits than its factorization.

21321311121030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66061.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21321311121030 its reverse (3012111312312), we get a palindrome (24333422433342).

The spelling of 21321311121030 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred eleven million, one hundred twenty-one thousand, thirty".