2120313453666 has 32 divisors (see below), whose sum is σ = 4355329616640. Its totient is φ = 687654832896.

The previous prime is 2120313453659. The next prime is 2120313453733. The reversal of 2120313453666 is 6663543130212.

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 15 ways as a sum of consecutive naturals, for example, 17461735 + ... + 17582741.

It is an arithmetic number, because the mean of its divisors is an integer number (136104050520).

Almost surely, 2^{2120313453666} is an apocalyptic number.

2120313453666 is an abundant number, since it is smaller than the sum of its proper divisors (2235016162974).

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

2120313453666 is a wasteful number, since it uses less digits than its factorization.

2120313453666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199978.

The product of its (nonzero) digits is 466560, while the sum is 42.

Adding to 2120313453666 its reverse (6663543130212), we get a palindrome (8783856583878).

The spelling of 2120313453666 in words is "two trillion, one hundred twenty billion, three hundred thirteen million, four hundred fifty-three thousand, six hundred sixty-six".