42661235221 has 8 divisors (see below), whose sum is σ = 46545879744. Its totient is φ = 38777649120.

The previous prime is 42661235219. The next prime is 42661235237. The reversal of 42661235221 is 12253216624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42661235221 - 2¹ = 42661235219 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 (42661235261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179121 + ... + 342646.

It is an arithmetic number, because the mean of its divisors is an integer number (5818234968).

Almost surely, 2^42661235221 is an apocalyptic number.

It is an amenable number.

42661235221 is a deficient number, since it is larger than the sum of its proper divisors (3884644523).

42661235221 is a wasteful number, since it uses less digits than its factorization.

42661235221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529211.

The product of its digits is 34560, while the sum is 34.

The spelling of 42661235221 in words is "forty-two billion, six hundred sixty-one million, two hundred thirty-five thousand, two hundred twenty-one".