4020223204121 has 4 divisors (see below), whose sum is σ = 4158851590500. Its totient is φ = 3881594817744.

The previous prime is 4020223203989. The next prime is 4020223204243. The reversal of 4020223204121 is 1214023220204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2881723534096 + 1138499670025 = 1697564^2 + 1067005^2 .

It is a cyclic number.

It is not a de Polignac number, because 4020223204121 - 2¹⁰ = 4020223203097 is a prime.

It is a super-2 number, since 2×4020223204121² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4020223204321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69314193146 + ... + 69314193203.

It is an arithmetic number, because the mean of its divisors is an integer number (1039712897625).

Almost surely, 2^{4020223204121} is an apocalyptic number.

It is an amenable number.

4020223204121 is a deficient number, since it is larger than the sum of its proper divisors (138628386379).

4020223204121 is a wasteful number, since it uses less digits than its factorization.

4020223204121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138628386378.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 4020223204121 its reverse (1214023220204), we get a palindrome (5234246424325).

The spelling of 4020223204121 in words is "four trillion, twenty billion, two hundred twenty-three million, two hundred four thousand, one hundred twenty-one".