331221231011 has 32 divisors (see below), whose sum is σ = 393858720000. Its totient is φ = 275150252160.

The previous prime is 331221231007. The next prime is 331221231013. The reversal of 331221231011 is 110132122133.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 331221231011 - 2² = 331221231007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331221231013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6149345 + ... + 6202973.

It is an arithmetic number, because the mean of its divisors is an integer number (12308085000).

Almost surely, 2^331221231011 is an apocalyptic number.

331221231011 is a deficient number, since it is larger than the sum of its proper divisors (62637488989).

331221231011 is a wasteful number, since it uses less digits than its factorization.

331221231011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54707.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 331221231011 its reverse (110132122133), we get a palindrome (441353353144).

The spelling of 331221231011 in words is "three hundred thirty-one billion, two hundred twenty-one million, two hundred thirty-one thousand, eleven".