4013520121 has 16 divisors (see below), whose sum is σ = 4468359168. Its totient is φ = 3579912000.

The previous prime is 4013520109. The next prime is 4013520127. The reversal of 4013520121 is 1210253104.

It is a cyclic number.

It is not a de Polignac number, because 4013520121 - 2¹⁵ = 4013487353 is a prime.

It is a super-2 number, since 2×4013520121² = 32216687523343709282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4013520127) 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, 275400 + ... + 289606.

It is an arithmetic number, because the mean of its divisors is an integer number (279272448).

Almost surely, 2^4013520121 is an apocalyptic number.

It is an amenable number.

4013520121 is a deficient number, since it is larger than the sum of its proper divisors (454839047).

4013520121 is a wasteful number, since it uses less digits than its factorization.

4013520121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14952.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 4013520121 is about 63352.3489777609. The cubic root of 4013520121 is about 1589.1875285540.

Adding to 4013520121 its reverse (1210253104), we get a palindrome (5223773225).

The spelling of 4013520121 in words is "four billion, thirteen million, five hundred twenty thousand, one hundred twenty-one".