2120021313 has 16 divisors (see below), whose sum is σ = 2836478400. Its totient is φ = 1408466880.

The previous prime is 2120021263. The next prime is 2120021341. The reversal of 2120021313 is 3131200212.

It is not a de Polignac number, because 2120021313 - 2²¹ = 2117924161 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2120021292 and 2120021301.

It is not an unprimeable number, because it can be changed into a prime (2120021353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1724383 + ... + 1725611.

It is an arithmetic number, because the mean of its divisors is an integer number (177279900).

Almost surely, 2^2120021313 is an apocalyptic number.

It is an amenable number.

2120021313 is a deficient number, since it is larger than the sum of its proper divisors (716457087).

2120021313 is a wasteful number, since it uses less digits than its factorization.

2120021313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2120021313 is about 46043.6891766939. The cubic root of 2120021313 is about 1284.6359626280.

Adding to 2120021313 its reverse (3131200212), we get a palindrome (5251221525).

The spelling of 2120021313 in words is "two billion, one hundred twenty million, twenty-one thousand, three hundred thirteen".