21133020134440 has 16 divisors (see below), whose sum is σ = 47549295302580. Its totient is φ = 8453208053760.

The previous prime is 21133020134431. The next prime is 21133020134461. The reversal of 21133020134440 is 4443102033112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17806897711684 + 3326122422756 = 4219822^2 + 1823766^2 .

It is a super-2 number, since 2×21133020134440² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21133020134399 and 21133020134408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264162751641 + ... + 264162751720.

Almost surely, 2^{21133020134440} is an apocalyptic number.

21133020134440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21133020134440 is an abundant number, since it is smaller than the sum of its proper divisors (26416275168140).

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

21133020134440 is a wasteful number, since it uses less digits than its factorization.

21133020134440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528325503372 (or 528325503368 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21133020134440 its reverse (4443102033112), we get a palindrome (25576122167552).

The spelling of 21133020134440 in words is "twenty-one trillion, one hundred thirty-three billion, twenty million, one hundred thirty-four thousand, four hundred forty".