2120105556643 has 8 divisors (see below), whose sum is σ = 2120975378768. Its totient is φ = 2119235893344.

The previous prime is 2120105556631. The next prime is 2120105556683. The reversal of 2120105556643 is 3466555010212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2120105556643 - 2³⁷ = 1982666603171 is a prime.

It is a super-3 number, since 3×2120105556643³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120105556596 and 2120105556605.

It is not an unprimeable number, because it can be changed into a prime (2120105556683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31665280 + ... + 31732162.

It is an arithmetic number, because the mean of its divisors is an integer number (265121922346).

Almost surely, 2^{2120105556643} is an apocalyptic number.

2120105556643 is a deficient number, since it is larger than the sum of its proper divisors (869822125).

2120105556643 is an equidigital number, since it uses as much as digits as its factorization.

2120105556643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79413.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 2120105556643 in words is "two trillion, one hundred twenty billion, one hundred five million, five hundred fifty-six thousand, six hundred forty-three".