4220112121 has 4 divisors (see below), whose sum is σ = 4299736932. Its totient is φ = 4140487312.

The previous prime is 4220112101. The next prime is 4220112203. The reversal of 4220112121 is 1212110224.

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 3356927721 + 863184400 = 57939^2 + 29380^2 .

It is a cyclic number.

It is not a de Polignac number, because 4220112121 - 2¹³ = 4220103929 is a prime.

It is a super-2 number, since 2×4220112121² = 35618692627622237282, 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 = 4220112095 and 4220112104.

It is not an unprimeable number, because it can be changed into a prime (4220112101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39812326 + ... + 39812431.

It is an arithmetic number, because the mean of its divisors is an integer number (1074934233).

Almost surely, 2^4220112121 is an apocalyptic number.

It is an amenable number.

4220112121 is a deficient number, since it is larger than the sum of its proper divisors (79624811).

4220112121 is an equidigital number, since it uses as much as digits as its factorization.

4220112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79624810.

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

The square root of 4220112121 is about 64962.3900499358. The cubic root of 4220112121 is about 1615.9999010769. Note that the first 4 decimals are identical.

Adding to 4220112121 its reverse (1212110224), we get a palindrome (5432222345).

The spelling of 4220112121 in words is "four billion, two hundred twenty million, one hundred twelve thousand, one hundred twenty-one".