4023121513 has 2 divisors, whose sum is σ = 4023121514. Its totient is φ = 4023121512.

The previous prime is 4023121511. The next prime is 4023121517. The reversal of 4023121513 is 3151213204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2320156224 + 1702965289 = 48168^2 + 41267^2 .

It is a cyclic number.

It is not a de Polignac number, because 4023121513 - 2¹ = 4023121511 is a prime.

Together with 4023121511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4023121511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2011560756 + 2011560757.

It is an arithmetic number, because the mean of its divisors is an integer number (2011560757).

Almost surely, 2^4023121513 is an apocalyptic number.

It is an amenable number.

4023121513 is a deficient number, since it is larger than the sum of its proper divisors (1).

4023121513 is an equidigital number, since it uses as much as digits as its factorization.

4023121513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 4023121513 is about 63428.0814229786. The cubic root of 4023121513 is about 1590.4537703845.

Adding to 4023121513 its reverse (3151213204), we get a palindrome (7174334717).

The spelling of 4023121513 in words is "four billion, twenty-three million, one hundred twenty-one thousand, five hundred thirteen".