42031221321 has 8 divisors (see below), whose sum is σ = 56045770624. Its totient is φ = 28018743120.

The previous prime is 42031221313. The next prime is 42031221329. The reversal of 42031221321 is 12312213024.

It is an interprime number because it is at equal distance from previous prime (42031221313) and next prime (42031221329).

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

It is not a de Polignac number, because 42031221321 - 2³ = 42031221313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42031221329) 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, 469786 + ... + 552051.

It is an arithmetic number, because the mean of its divisors is an integer number (7005721328).

Almost surely, 2^42031221321 is an apocalyptic number.

It is an amenable number.

42031221321 is a deficient number, since it is larger than the sum of its proper divisors (14014549303).

42031221321 is a wasteful number, since it uses less digits than its factorization.

42031221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035551.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 42031221321 its reverse (12312213024), we get a palindrome (54343434345).

The spelling of 42031221321 in words is "forty-two billion, thirty-one million, two hundred twenty-one thousand, three hundred twenty-one".