331122421 has 8 divisors (see below), whose sum is σ = 394879104. Its totient is φ = 271479120.

The previous prime is 331122409. The next prime is 331122433. The reversal of 331122421 is 124221133.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (331122409) and next prime (331122433).

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

It is not a de Polignac number, because 331122421 - 2⁷ = 331122293 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 (331122721) 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 7 ways as a sum of consecutive naturals, for example, 1028170 + ... + 1028491.

It is an arithmetic number, because the mean of its divisors is an integer number (49359888).

Almost surely, 2^331122421 is an apocalyptic number.

It is an amenable number.

331122421 is a deficient number, since it is larger than the sum of its proper divisors (63756683).

331122421 is a wasteful number, since it uses less digits than its factorization.

331122421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056691.

The product of its digits is 288, while the sum is 19.

The square root of 331122421 is about 18196.7695209892. The cubic root of 331122421 is about 691.8249115710.

Adding to 331122421 its reverse (124221133), we get a palindrome (455343554).

The spelling of 331122421 in words is "three hundred thirty-one million, one hundred twenty-two thousand, four hundred twenty-one".