4220123121 has 12 divisors (see below), whose sum is σ = 6152704272. Its totient is φ = 2787121176.

The previous prime is 4220123113. The next prime is 4220123143. The reversal of 4220123121 is 1213210224.

It is a happy number.

4220123121 is a `hidden beast` number, since 422 + 0 + 123 + 121 = 666.

It is not a de Polignac number, because 4220123121 - 2³ = 4220123113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4220123094 and 4220123103.

It is not an unprimeable number, because it can be changed into a prime (4220123111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2190171 + ... + 2192096.

It is an arithmetic number, because the mean of its divisors is an integer number (512725356).

Almost surely, 2^4220123121 is an apocalyptic number.

It is an amenable number.

4220123121 is a deficient number, since it is larger than the sum of its proper divisors (1932581151).

4220123121 is a wasteful number, since it uses less digits than its factorization.

4220123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4382380 (or 4382377 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 4220123121 is about 64962.4747142533. The cubic root of 4220123121 is about 1616.0013051457.

Adding to 4220123121 its reverse (1213210224), we get a palindrome (5433333345).

The spelling of 4220123121 in words is "four billion, two hundred twenty million, one hundred twenty-three thousand, one hundred twenty-one".