42121303331 has 4 divisors (see below), whose sum is σ = 42165782952. Its totient is φ = 42076823712.

The previous prime is 42121303327. The next prime is 42121303403. The reversal of 42121303331 is 13330312124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42121303331 - 2² = 42121303327 is a prime.

It is a super-2 number, since 2×42121303331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42121303297 and 42121303306.

It is not an unprimeable number, because it can be changed into a prime (42121303831) 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, 22238390 + ... + 22240283.

It is an arithmetic number, because the mean of its divisors is an integer number (10541445738).

Almost surely, 2^42121303331 is an apocalyptic number.

42121303331 is a deficient number, since it is larger than the sum of its proper divisors (44479621).

42121303331 is an equidigital number, since it uses as much as digits as its factorization.

42121303331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44479620.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 42121303331 its reverse (13330312124), we get a palindrome (55451615455).

The spelling of 42121303331 in words is "forty-two billion, one hundred twenty-one million, three hundred three thousand, three hundred thirty-one".