2120521964 has 12 divisors (see below), whose sum is σ = 4048269288. Its totient is φ = 963873600.

The previous prime is 2120521933. The next prime is 2120521969. The reversal of 2120521964 is 4691250212.

It is a super-2 number, since 2×2120521964² = 8993226799612834592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2120521964.

It is not an unprimeable number, because it can be changed into a prime (2120521969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24096797 + ... + 24096884.

It is an arithmetic number, because the mean of its divisors is an integer number (337355774).

Almost surely, 2^2120521964 is an apocalyptic number.

It is an amenable number.

2120521964 is a deficient number, since it is larger than the sum of its proper divisors (1927747324).

2120521964 is a wasteful number, since it uses less digits than its factorization.

2120521964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48193696 (or 48193694 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2120521964 is about 46049.1255508723. The cubic root of 2120521964 is about 1284.7370785388.

The spelling of 2120521964 in words is "two billion, one hundred twenty million, five hundred twenty-one thousand, nine hundred sixty-four".