4000430121 has 16 divisors (see below), whose sum is σ = 5481028800. Its totient is φ = 2593470528.

The previous prime is 4000430111. The next prime is 4000430131. The reversal of 4000430121 is 1210340004.

It is an interprime number because it is at equal distance from previous prime (4000430111) and next prime (4000430131).

It is not a de Polignac number, because 4000430121 - 2¹⁴ = 4000413737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4000430121.

It is not an unprimeable number, because it can be changed into a prime (4000430111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220950 + ... + 238368.

It is an arithmetic number, because the mean of its divisors is an integer number (342564300).

Almost surely, 2^4000430121 is an apocalyptic number.

It is an amenable number.

4000430121 is a deficient number, since it is larger than the sum of its proper divisors (1480598679).

4000430121 is a wasteful number, since it uses less digits than its factorization.

4000430121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19528.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 4000430121 is about 63248.9535170346. The cubic root of 4000430121 is about 1587.4579478062.

Adding to 4000430121 its reverse (1210340004), we get a palindrome (5210770125).

It can be divided in two parts, 40004 and 30121, that added together give a triangular number (70125 = T₃₇₄).

The spelling of 4000430121 in words is "four billion, four hundred thirty thousand, one hundred twenty-one".