21355422455312 has 30 divisors (see below), whose sum is σ = 45479548962414. Its totient is φ = 9707010206080.

The previous prime is 21355422455291. The next prime is 21355422455369.

21355422455312 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 20354390189056 + 1001032266256 = 4511584^2 + 1000516^2 .

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5515344773 + ... + 5515348644.

Almost surely, 2^{21355422455312} is an apocalyptic number.

21355422455312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21355422455312 is an abundant number, since it is smaller than the sum of its proper divisors (24124126507102).

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

21355422455312 is a wasteful number, since it uses less digits than its factorization.

21355422455312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11030693447 (or 11030693430 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 44.

The spelling of 21355422455312 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred twenty-two million, four hundred fifty-five thousand, three hundred twelve".