30311332221 has 8 divisors (see below), whose sum is σ = 40544232640. Its totient is φ = 20142993312.

The previous prime is 30311332199. The next prime is 30311332273. The reversal of 30311332221 is 12223311303.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30311332221 - 2¹⁵ = 30311299453 is a prime.

It is a super-2 number, since 2×30311332221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30311332291) 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, 16139281 + ... + 16141158.

It is an arithmetic number, because the mean of its divisors is an integer number (5068029080).

Almost surely, 2^30311332221 is an apocalyptic number.

It is an amenable number.

30311332221 is a deficient number, since it is larger than the sum of its proper divisors (10232900419).

30311332221 is a wasteful number, since it uses less digits than its factorization.

30311332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32280755.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 30311332221 its reverse (12223311303), we get a palindrome (42534643524).

The spelling of 30311332221 in words is "thirty billion, three hundred eleven million, three hundred thirty-two thousand, two hundred twenty-one".