6051111221 has 4 divisors (see below), whose sum is σ = 6051523692. Its totient is φ = 6050698752.

The previous prime is 6051111211. The next prime is 6051111229. The reversal of 6051111221 is 1221111506.

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 1292043025 + 4759068196 = 35945^2 + 68986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6051111221 is a prime.

It is a super-2 number, since 2×6051111221² = 73231894017824221682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6051111193 and 6051111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6051111229) 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, 183386 + ... + 213851.

It is an arithmetic number, because the mean of its divisors is an integer number (1512880923).

Almost surely, 2^6051111221 is an apocalyptic number.

It is an amenable number.

6051111221 is a deficient number, since it is larger than the sum of its proper divisors (412471).

6051111221 is a wasteful number, since it uses less digits than its factorization.

6051111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412470.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 6051111221 is about 77788.8888016791. Note that the first 4 decimals coincide. The cubic root of 6051111221 is about 1822.2657468768.

Adding to 6051111221 its reverse (1221111506), we get a palindrome (7272222727).

The spelling of 6051111221 in words is "six billion, fifty-one million, one hundred eleven thousand, two hundred twenty-one".