4021120161 has 24 divisors (see below), whose sum is σ = 5913180000. Its totient is φ = 2632433472.

The previous prime is 4021120139. The next prime is 4021120163. The reversal of 4021120161 is 1610211204.

4021120161 is a `hidden beast` number, since 402 + 1 + 1 + 201 + 61 = 666.

It is not a de Polignac number, because 4021120161 - 2⁶ = 4021120097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4021120163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 553410 + ... + 560628.

It is an arithmetic number, because the mean of its divisors is an integer number (246382500).

Almost surely, 2^4021120161 is an apocalyptic number.

It is an amenable number.

4021120161 is a deficient number, since it is larger than the sum of its proper divisors (1892059839).

4021120161 is a wasteful number, since it uses less digits than its factorization.

4021120161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8333 (or 8330 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 4021120161 is about 63412.3029151284. The cubic root of 4021120161 is about 1590.1899962822.

Adding to 4021120161 its reverse (1610211204), we get a palindrome (5631331365).

The spelling of 4021120161 in words is "four billion, twenty-one million, one hundred twenty thousand, one hundred sixty-one".