42040040042221 has 8 divisors (see below), whose sum is σ = 45599600711840. Its totient is φ = 38527009577712.

The previous prime is 42040040042219. The next prime is 42040040042237. The reversal of 42040040042221 is 12224004004024.

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 42040040042221 - 2¹ = 42040040042219 is a prime.

It is a super-2 number, since 2×42040040042221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42040040042621) 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, 11632549395 + ... + 11632553008.

It is an arithmetic number, because the mean of its divisors is an integer number (5699950088980).

Almost surely, 2^{42040040042221} is an apocalyptic number.

It is an amenable number.

42040040042221 is a deficient number, since it is larger than the sum of its proper divisors (3559560669619).

42040040042221 is a wasteful number, since it uses less digits than its factorization.

42040040042221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23265102555.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 42040040042221 its reverse (12224004004024), we get a palindrome (54264044046245).

The spelling of 42040040042221 in words is "forty-two trillion, forty billion, forty million, forty-two thousand, two hundred twenty-one".