331221213011 has 32 divisors (see below), whose sum is σ = 371689335360. Its totient is φ = 293159116800.

The previous prime is 331221212983. The next prime is 331221213053. The reversal of 331221213011 is 110312122133.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 331221213011 - 2⁶ = 331221212947 is a prime.

It is a super-2 number, since 2×331221213011² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331221213811) 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, 49513955 + ... + 49520643.

It is an arithmetic number, because the mean of its divisors is an integer number (11615291730).

Almost surely, 2^331221213011 is an apocalyptic number.

331221213011 is a deficient number, since it is larger than the sum of its proper divisors (40468122349).

331221213011 is a wasteful number, since it uses less digits than its factorization.

331221213011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8327.

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

Adding to 331221213011 its reverse (110312122133), we get a palindrome (441533335144).

The spelling of 331221213011 in words is "three hundred thirty-one billion, two hundred twenty-one million, two hundred thirteen thousand, eleven".