2120533564643 has 4 divisors (see below), whose sum is σ = 2283651531168. Its totient is φ = 1957415598120.

The previous prime is 2120533564637. The next prime is 2120533564649. The reversal of 2120533564643 is 3464653350212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2120533564637) and next prime (2120533564649).

It is a cyclic number.

It is not a de Polignac number, because 2120533564643 - 2¹⁶ = 2120533499107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120533564594 and 2120533564603.

It is not an unprimeable number, because it can be changed into a prime (2120533564649) 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, 81558983243 + ... + 81558983268.

It is an arithmetic number, because the mean of its divisors is an integer number (570912882792).

Almost surely, 2^{2120533564643} is an apocalyptic number.

2120533564643 is a deficient number, since it is larger than the sum of its proper divisors (163117966525).

2120533564643 is a wasteful number, since it uses less digits than its factorization.

2120533564643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163117966524.

The product of its (nonzero) digits is 1555200, while the sum is 44.

The spelling of 2120533564643 in words is "two trillion, one hundred twenty billion, five hundred thirty-three million, five hundred sixty-four thousand, six hundred forty-three".