331201021321111 has 4 divisors (see below), whose sum is σ = 331292085669352. Its totient is φ = 331109956972872.

The previous prime is 331201021321103. The next prime is 331201021321117. The reversal of 331201021321111 is 111123120102133.

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 331201021321111 - 2³ = 331201021321103 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 (331201021321117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45532168665 + ... + 45532175938.

It is an arithmetic number, because the mean of its divisors is an integer number (82823021417338).

Almost surely, 2^{331201021321111} is an apocalyptic number.

331201021321111 is a deficient number, since it is larger than the sum of its proper divisors (91064348241).

331201021321111 is an equidigital number, since it uses as much as digits as its factorization.

331201021321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91064348240.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 331201021321111 its reverse (111123120102133), we get a palindrome (442324141423244).

The spelling of 331201021321111 in words is "three hundred thirty-one trillion, two hundred one billion, twenty-one million, three hundred twenty-one thousand, one hundred eleven".