331221412402 has 16 divisors (see below), whose sum is σ = 519927584832. Its totient is φ = 157953719440.

The previous prime is 331221412363. The next prime is 331221412409. The reversal of 331221412402 is 204214122133.

It is not an unprimeable number, because it can be changed into a prime (331221412409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10359349 + ... + 10391272.

It is an arithmetic number, because the mean of its divisors is an integer number (32495474052).

Almost surely, 2^331221412402 is an apocalyptic number.

331221412402 is a deficient number, since it is larger than the sum of its proper divisors (188706172430).

331221412402 is a wasteful number, since it uses less digits than its factorization.

331221412402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20750993.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 331221412402 its reverse (204214122133), we get a palindrome (535435534535).

The spelling of 331221412402 in words is "three hundred thirty-one billion, two hundred twenty-one million, four hundred twelve thousand, four hundred two".