2121201313 has 32 divisors (see below), whose sum is σ = 2670999552. Its totient is φ = 1636502400.

The previous prime is 2121201311. The next prime is 2121201323. The reversal of 2121201313 is 3131021212.

It is a cyclic number.

It is not a de Polignac number, because 2121201313 - 2¹ = 2121201311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121201311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6776845 + ... + 6777157.

It is an arithmetic number, because the mean of its divisors is an integer number (83468736).

Almost surely, 2^2121201313 is an apocalyptic number.

It is an amenable number.

2121201313 is a deficient number, since it is larger than the sum of its proper divisors (549798239).

2121201313 is a wasteful number, since it uses less digits than its factorization.

2121201313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925.

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

The square root of 2121201313 is about 46056.5013108899. The cubic root of 2121201313 is about 1284.8742604335.

Adding to 2121201313 its reverse (3131021212), we get a palindrome (5252222525).

The spelling of 2121201313 in words is "two billion, one hundred twenty-one million, two hundred one thousand, three hundred thirteen".