4020040121 has 8 divisors (see below), whose sum is σ = 4345990080. Its totient is φ = 3705527088.

The previous prime is 4020040109. The next prime is 4020040127. The reversal of 4020040121 is 1210400204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4020040121 - 2¹⁰ = 4020039097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4020040096 and 4020040105.

It is not an unprimeable number, because it can be changed into a prime (4020040127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2858501 + ... + 2859906.

It is an arithmetic number, because the mean of its divisors is an integer number (543248760).

Almost surely, 2^4020040121 is an apocalyptic number.

It is an amenable number.

4020040121 is a deficient number, since it is larger than the sum of its proper divisors (325949959).

4020040121 is a wasteful number, since it uses less digits than its factorization.

4020040121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5718463.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 4020040121 is about 63403.7863301554. The cubic root of 4020040121 is about 1590.0476128563.

Adding to 4020040121 its reverse (1210400204), we get a palindrome (5230440325).

The spelling of 4020040121 in words is "four billion, twenty million, forty thousand, one hundred twenty-one".