4022120261 has 4 divisors (see below), whose sum is σ = 4130826252. Its totient is φ = 3913414272.

The previous prime is 4022120257. The next prime is 4022120293. The reversal of 4022120261 is 1620212204.

It is a happy number.

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 3323522500 + 698597761 = 57650^2 + 26431^2 .

It is a cyclic number.

It is not a de Polignac number, because 4022120261 - 2² = 4022120257 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 (4022129261) 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, 54352940 + ... + 54353013.

It is an arithmetic number, because the mean of its divisors is an integer number (1032706563).

Almost surely, 2^4022120261 is an apocalyptic number.

It is an amenable number.

4022120261 is a deficient number, since it is larger than the sum of its proper divisors (108705991).

4022120261 is a wasteful number, since it uses less digits than its factorization.

4022120261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108705990.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 4022120261 is about 63420.1881186109. The cubic root of 4022120261 is about 1590.3218183553.

Adding to 4022120261 its reverse (1620212204), we get a palindrome (5642332465).

The spelling of 4022120261 in words is "four billion, twenty-two million, one hundred twenty thousand, two hundred sixty-one".