331024021421 has 8 divisors (see below), whose sum is σ = 333615920184. Its totient is φ = 328434668800.

The previous prime is 331024021417. The next prime is 331024021511. The reversal of 331024021421 is 124120420133.

It can be written as a sum of positive squares in 4 ways, for example, as 12266670025 + 318757351396 = 110755^2 + 564586^2 .

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 331024021421 - 2² = 331024021417 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 (331021021421) 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, 375080 + ... + 895953.

It is an arithmetic number, because the mean of its divisors is an integer number (41701990023).

Almost surely, 2^331024021421 is an apocalyptic number.

It is an amenable number.

331024021421 is a deficient number, since it is larger than the sum of its proper divisors (2591898763).

331024021421 is a wasteful number, since it uses less digits than its factorization.

331024021421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273071.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 331024021421 its reverse (124120420133), we get a palindrome (455144441554).

The spelling of 331024021421 in words is "three hundred thirty-one billion, twenty-four million, twenty-one thousand, four hundred twenty-one".