56221005101 has 4 divisors (see below), whose sum is σ = 56344027452. Its totient is φ = 56097982752.

The previous prime is 56221005077. The next prime is 56221005163. The reversal of 56221005101 is 10150012265.

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 48949350025 + 7271655076 = 221245^2 + 85274^2 .

It is a cyclic number.

It is not a de Polignac number, because 56221005101 - 2⁶ = 56221005037 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 (56221005901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61510490 + ... + 61511403.

It is an arithmetic number, because the mean of its divisors is an integer number (14086006863).

Almost surely, 2^56221005101 is an apocalyptic number.

It is an amenable number.

56221005101 is a deficient number, since it is larger than the sum of its proper divisors (123022351).

56221005101 is a wasteful number, since it uses less digits than its factorization.

56221005101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123022350.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 56221005101 its reverse (10150012265), we get a palindrome (66371017366).

The spelling of 56221005101 in words is "fifty-six billion, two hundred twenty-one million, five thousand, one hundred one".