3211012021221 has 12 divisors (see below), whose sum is σ = 4638371063040. Its totient is φ = 2140562717160.

The previous prime is 3211012021193. The next prime is 3211012021249. The reversal of 3211012021221 is 1221202101123.

3211012021221 is a `hidden beast` number, since 321 + 1 + 0 + 120 + 2 + 1 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (3211012021193) and next prime (3211012021249).

It is not a de Polignac number, because 3211012021221 - 2⁶ = 3211012021157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3211012021194 and 3211012021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3211012022221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9148485 + ... + 9492986.

It is an arithmetic number, because the mean of its divisors is an integer number (386530921920).

Almost surely, 2^{3211012021221} is an apocalyptic number.

It is an amenable number.

3211012021221 is a deficient number, since it is larger than the sum of its proper divisors (1427359041819).

3211012021221 is a wasteful number, since it uses less digits than its factorization.

3211012021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18660616 (or 18660613 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 3211012021221 its reverse (1221202101123), we get a palindrome (4432214122344).

The spelling of 3211012021221 in words is "three trillion, two hundred eleven billion, twelve million, twenty-one thousand, two hundred twenty-one".