42221242261 has 4 divisors (see below), whose sum is σ = 46059537024. Its totient is φ = 38382947500.

The previous prime is 42221242253. The next prime is 42221242337. The reversal of 42221242261 is 16224212224.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42221242261 - 2³ = 42221242253 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 (42221242061) 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, 1919147365 + ... + 1919147386.

It is an arithmetic number, because the mean of its divisors is an integer number (11514884256).

Almost surely, 2^42221242261 is an apocalyptic number.

It is an amenable number.

42221242261 is a deficient number, since it is larger than the sum of its proper divisors (3838294763).

42221242261 is a wasteful number, since it uses less digits than its factorization.

42221242261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838294762.

The product of its digits is 6144, while the sum is 28.

Adding to 42221242261 its reverse (16224212224), we get a palindrome (58445454485).

It can be divided in two parts, 42221 and 242261, that added together give a palindrome (284482).

The spelling of 42221242261 in words is "forty-two billion, two hundred twenty-one million, two hundred forty-two thousand, two hundred sixty-one".