4002020122 has 16 divisors (see below), whose sum is σ = 6489764640. Its totient is φ = 1844458128.

The previous prime is 4002020111. The next prime is 4002020123. The reversal of 4002020122 is 2210202004.

It is not an unprimeable number, because it can be changed into a prime (4002020123) 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 7 ways as a sum of consecutive naturals, for example, 1421788 + ... + 1424599.

It is an arithmetic number, because the mean of its divisors is an integer number (405610290).

Almost surely, 2^4002020122 is an apocalyptic number.

4002020122 is a deficient number, since it is larger than the sum of its proper divisors (2487744518).

4002020122 is a wasteful number, since it uses less digits than its factorization.

4002020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846445.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 4002020122 is about 63261.5216541619. The cubic root of 4002020122 is about 1587.6682356436.

Adding to 4002020122 its reverse (2210202004), we get a palindrome (6212222126).

The spelling of 4002020122 in words is "four billion, two million, twenty thousand, one hundred twenty-two".