4561221356611 has 4 divisors (see below), whose sum is σ = 4561225749000. Its totient is φ = 4561216964224.

The previous prime is 4561221356581. The next prime is 4561221356633. The reversal of 4561221356611 is 1166531221654.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4561221356611 - 2²¹ = 4561219259459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4561221350611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330240 + ... + 3038338.

It is an arithmetic number, because the mean of its divisors is an integer number (1140306437250).

Almost surely, 2^{4561221356611} is an apocalyptic number.

4561221356611 is a deficient number, since it is larger than the sum of its proper divisors (4392389).

4561221356611 is a wasteful number, since it uses less digits than its factorization.

4561221356611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4392388.

The product of its digits is 259200, while the sum is 43.

The spelling of 4561221356611 in words is "four trillion, five hundred sixty-one billion, two hundred twenty-one million, three hundred fifty-six thousand, six hundred eleven".