21455450330012 has 12 divisors (see below), whose sum is σ = 38841763528680. Its totient is φ = 10357803607536.

The previous prime is 21455450330011. The next prime is 21455450330023. The reversal of 21455450330012 is 21003305455412.

It is a super-2 number, since 2×21455450330012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21455450330011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92480389238 + ... + 92480389469.

It is an arithmetic number, because the mean of its divisors is an integer number (3236813627390).

Almost surely, 2^{21455450330012} is an apocalyptic number.

It is an amenable number.

21455450330012 is a deficient number, since it is larger than the sum of its proper divisors (17386313198668).

21455450330012 is a wasteful number, since it uses less digits than its factorization.

21455450330012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184960778740 (or 184960778738 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 21455450330012 its reverse (21003305455412), we get a palindrome (42458755785424).

The spelling of 21455450330012 in words is "twenty-one trillion, four hundred fifty-five billion, four hundred fifty million, three hundred thirty thousand, twelve".