4121221061 has 16 divisors (see below), whose sum is σ = 4324739568. Its totient is φ = 3923251200.

The previous prime is 4121221043. The next prime is 4121221063. The reversal of 4121221061 is 1601221214.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 24453025 + 4096768036 = 4945^2 + 64006^2 .

It is a cyclic number.

It is not a de Polignac number, because 4121221061 - 2¹⁴ = 4121204677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121221063) 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, 430871 + ... + 440331.

It is an arithmetic number, because the mean of its divisors is an integer number (270296223).

Almost surely, 2^4121221061 is an apocalyptic number.

It is an amenable number.

4121221061 is a deficient number, since it is larger than the sum of its proper divisors (203518507).

4121221061 is a wasteful number, since it uses less digits than its factorization.

4121221061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9752.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 4121221061 is about 64196.7371522884. The cubic root of 4121221061 is about 1603.2772749027.

Adding to 4121221061 its reverse (1601221214), we get a palindrome (5722442275).

The spelling of 4121221061 in words is "four billion, one hundred twenty-one million, two hundred twenty-one thousand, sixty-one".