3211103311221 has 24 divisors (see below), whose sum is σ = 4642763295456. Its totient is φ = 1973244436800.

The previous prime is 3211103311217. The next prime is 3211103311279. The reversal of 3211103311221 is 1221133011123.

It is not a de Polignac number, because 3211103311221 - 2² = 3211103311217 is a prime.

It is a super-2 number, since 2×3211103311221² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3211103311121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4162095 + ... + 4872908.

It is an arithmetic number, because the mean of its divisors is an integer number (193448470644).

Almost surely, 2^{3211103311221} is an apocalyptic number.

It is an amenable number.

3211103311221 is a deficient number, since it is larger than the sum of its proper divisors (1431659984235).

3211103311221 is a wasteful number, since it uses less digits than its factorization.

3211103311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9035733 (or 9035720 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 3211103311221 its reverse (1221133011123), we get a palindrome (4432236322344).

The spelling of 3211103311221 in words is "three trillion, two hundred eleven billion, one hundred three million, three hundred eleven thousand, two hundred twenty-one".