4020402230121 has 16 divisors (see below), whose sum is σ = 5505667817600. Its totient is φ = 2607709033728.

The previous prime is 4020402230081. The next prime is 4020402230129. The reversal of 4020402230121 is 1210322040204.

It is not a de Polignac number, because 4020402230121 - 2²⁷ = 4020268012393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4020402230129) 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 15 ways as a sum of consecutive naturals, for example, 1637940 + ... + 3274698.

It is an arithmetic number, because the mean of its divisors is an integer number (344104238600).

Almost surely, 2^{4020402230121} is an apocalyptic number.

It is an amenable number.

4020402230121 is a deficient number, since it is larger than the sum of its proper divisors (1485265587479).

4020402230121 is a wasteful number, since it uses less digits than its factorization.

4020402230121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658928.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 4020402230121 its reverse (1210322040204), we get a palindrome (5230724270325).

The spelling of 4020402230121 in words is "four trillion, twenty billion, four hundred two million, two hundred thirty thousand, one hundred twenty-one".