2120620555 has 4 divisors (see below), whose sum is σ = 2544744672. Its totient is φ = 1696496440.

The previous prime is 2120620519. The next prime is 2120620561. The reversal of 2120620555 is 5550260212.

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

It is not a de Polignac number, because 2120620555 - 2⁷ = 2120620427 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212062051 + ... + 212062060.

It is an arithmetic number, because the mean of its divisors is an integer number (636186168).

Almost surely, 2^2120620555 is an apocalyptic number.

2120620555 is a deficient number, since it is larger than the sum of its proper divisors (424124117).

2120620555 is an equidigital number, since it uses as much as digits as its factorization.

2120620555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424124116.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2120620555 is about 46050.1960364991. The cubic root of 2120620555 is about 1284.7569889748.

Adding to 2120620555 its reverse (5550260212), we get a palindrome (7670880767).

The spelling of 2120620555 in words is "two billion, one hundred twenty million, six hundred twenty thousand, five hundred fifty-five".