41221356461 has 4 divisors (see below), whose sum is σ = 41238613500. Its totient is φ = 41204099424.

The previous prime is 41221356437. The next prime is 41221356497. The reversal of 41221356461 is 16465312214.

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 9298744900 + 31922611561 = 96430^2 + 178669^2 .

It is a cyclic number.

It is not a de Polignac number, because 41221356461 - 2¹⁴ = 41221340077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41220356461) 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, 8624936 + ... + 8629713.

It is an arithmetic number, because the mean of its divisors is an integer number (10309653375).

Almost surely, 2^41221356461 is an apocalyptic number.

It is an amenable number.

41221356461 is a deficient number, since it is larger than the sum of its proper divisors (17257039).

41221356461 is a wasteful number, since it uses less digits than its factorization.

41221356461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17257038.

The product of its digits is 34560, while the sum is 35.

Adding to 41221356461 its reverse (16465312214), we get a palindrome (57686668675).

The spelling of 41221356461 in words is "forty-one billion, two hundred twenty-one million, three hundred fifty-six thousand, four hundred sixty-one".