2120555697 has 32 divisors (see below), whose sum is σ = 3071523840. Its totient is φ = 1293606720.

The previous prime is 2120555687. The next prime is 2120555737. The reversal of 2120555697 is 7965550212.

It is not a de Polignac number, because 2120555697 - 2¹¹ = 2120553649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2120555687) 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 31 ways as a sum of consecutive naturals, for example, 3612238 + ... + 3612824.

It is an arithmetic number, because the mean of its divisors is an integer number (95985120).

Almost surely, 2^2120555697 is an apocalyptic number.

It is an amenable number.

2120555697 is a deficient number, since it is larger than the sum of its proper divisors (950968143).

2120555697 is a wasteful number, since it uses less digits than its factorization.

2120555697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253.

The product of its (nonzero) digits is 189000, while the sum is 42.

The square root of 2120555697 is about 46049.4918213003. The cubic root of 2120555697 is about 1284.7438909820.

The spelling of 2120555697 in words is "two billion, one hundred twenty million, five hundred fifty-five thousand, six hundred ninety-seven".