4000035121 has 16 divisors (see below), whose sum is σ = 4165862400. Its totient is φ = 3836669760.

The previous prime is 4000035119. The next prime is 4000035131. The reversal of 4000035121 is 1215300004.

It is a cyclic number.

It is not a de Polignac number, because 4000035121 - 2¹ = 4000035119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4000035095 and 4000035104.

It is not an unprimeable number, because it can be changed into a prime (4000035131) 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, 1806411 + ... + 1808623.

It is an arithmetic number, because the mean of its divisors is an integer number (260366400).

Almost surely, 2^4000035121 is an apocalyptic number.

It is an amenable number.

4000035121 is a deficient number, since it is larger than the sum of its proper divisors (165827279).

4000035121 is a wasteful number, since it uses less digits than its factorization.

4000035121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 4000035121 is about 63245.8308586424. The cubic root of 4000035121 is about 1587.4056978806.

Adding to 4000035121 its reverse (1215300004), we get a palindrome (5215335125).

The spelling of 4000035121 in words is "four billion, thirty-five thousand, one hundred twenty-one".