2121230013 has 16 divisors (see below), whose sum is σ = 3250414080. Its totient is φ = 1205357616.

The previous prime is 2121229973. The next prime is 2121230051. The reversal of 2121230013 is 3100321212.

It is not a de Polignac number, because 2121230013 - 2⁶ = 2121229949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121229974 and 2121230001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121230213) 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, 278395 + ... + 285912.

It is an arithmetic number, because the mean of its divisors is an integer number (203150880).

Almost surely, 2^2121230013 is an apocalyptic number.

It is an amenable number.

2121230013 is a deficient number, since it is larger than the sum of its proper divisors (1129184067).

2121230013 is a wasteful number, since it uses less digits than its factorization.

2121230013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564496.

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

The square root of 2121230013 is about 46056.8128836549. The cubic root of 2121230013 is about 1284.8800552198.

Adding to 2121230013 its reverse (3100321212), we get a palindrome (5221551225).

The spelling of 2121230013 in words is "two billion, one hundred twenty-one million, two hundred thirty thousand, thirteen".