2120512533444 has 72 divisors (see below), whose sum is σ = 5373669151032. Its totient is φ = 705061324800.

The previous prime is 2120512533431. The next prime is 2120512533457. The reversal of 2120512533444 is 4443352150212.

It is a happy number.

2120512533444 is a `hidden beast` number, since 2 + 1 + 20 + 512 + 53 + 34 + 44 = 666.

It is an interprime number because it is at equal distance from previous prime (2120512533431) and next prime (2120512533457).

It can be written as a sum of positive squares in 4 ways, for example, as 353442140100 + 1767070393344 = 594510^2 + 1329312^2 .

It is a super-2 number, since 2×2120512533444² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2120512533399 and 2120512533408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25770672 + ... + 25852824.

Almost surely, 2^{2120512533444} is an apocalyptic number.

It is an amenable number.

2120512533444 is an abundant number, since it is smaller than the sum of its proper divisors (3253156617588).

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

2120512533444 is a wasteful number, since it uses less digits than its factorization.

2120512533444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83957 (or 83952 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 2120512533444 its reverse (4443352150212), we get a palindrome (6563864683656).

The spelling of 2120512533444 in words is "two trillion, one hundred twenty billion, five hundred twelve million, five hundred thirty-three thousand, four hundred forty-four".