4221120121 has 8 divisors (see below), whose sum is σ = 4255020000. Its totient is φ = 4187245920.

The previous prime is 4221120107. The next prime is 4221120133. The reversal of 4221120121 is 1210211224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4221120121 - 2¹¹ = 4221118073 is a prime.

It is a super-2 number, since 2×4221120121² = 35635710151822109282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4221120095 and 4221120104.

It is not an unprimeable number, because it can be changed into a prime (4221190121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453765 + ... + 462973.

It is an arithmetic number, because the mean of its divisors is an integer number (531877500).

Almost surely, 2^4221120121 is an apocalyptic number.

It is an amenable number.

4221120121 is a deficient number, since it is larger than the sum of its proper divisors (33899879).

4221120121 is a wasteful number, since it uses less digits than its factorization.

4221120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12839.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 4221120121 is about 64970.1479219495. The cubic root of 4221120121 is about 1616.1285547064.

Adding to 4221120121 its reverse (1210211224), we get a palindrome (5431331345).

The spelling of 4221120121 in words is "four billion, two hundred twenty-one million, one hundred twenty thousand, one hundred twenty-one".