42120321331 has 32 divisors (see below), whose sum is σ = 48256911360. Its totient is φ = 36422524800.

The previous prime is 42120321311. The next prime is 42120321343. The reversal of 42120321331 is 13312302124.

It is a cyclic number.

It is not a de Polignac number, because 42120321331 - 2⁹ = 42120320819 is a prime.

It is a super-2 number, since 2×42120321331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42120321311) 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 31 ways as a sum of consecutive naturals, for example, 4141030 + ... + 4151188.

It is an arithmetic number, because the mean of its divisors is an integer number (1508028480).

Almost surely, 2^42120321331 is an apocalyptic number.

42120321331 is a deficient number, since it is larger than the sum of its proper divisors (6136590029).

42120321331 is a wasteful number, since it uses less digits than its factorization.

42120321331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10435.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 42120321331 its reverse (13312302124), we get a palindrome (55432623455).

The spelling of 42120321331 in words is "forty-two billion, one hundred twenty million, three hundred twenty-one thousand, three hundred thirty-one".