2120313121 has 4 divisors (see below), whose sum is σ = 2212500672. Its totient is φ = 2028125572.

The previous prime is 2120313077. The next prime is 2120313131. The reversal of 2120313121 is 1213130212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2120313121 - 2¹⁵ = 2120280353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120313095 and 2120313104.

It is not an unprimeable number, because it can be changed into a prime (2120313131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46093741 + ... + 46093786.

It is an arithmetic number, because the mean of its divisors is an integer number (553125168).

Almost surely, 2^2120313121 is an apocalyptic number.

It is an amenable number.

2120313121 is a deficient number, since it is larger than the sum of its proper divisors (92187551).

2120313121 is an equidigital number, since it uses as much as digits as its factorization.

2120313121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92187550.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2120313121 is about 46046.8578841163. The cubic root of 2120313121 is about 1284.6949006916.

Adding to 2120313121 its reverse (1213130212), we get a palindrome (3333443333).

The spelling of 2120313121 in words is "two billion, one hundred twenty million, three hundred thirteen thousand, one hundred twenty-one".