3031012021221 has 6 divisors (see below), whose sum is σ = 4378128475110. Its totient is φ = 2020674680808.

The previous prime is 3031012021217. The next prime is 3031012021259. The reversal of 3031012021221 is 1221202101303.

3031012021221 is a `hidden beast` number, since 3 + 0 + 310 + 120 + 212 + 21 = 666.

3031012021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2515351592196 + 515660429025 = 1585986^2 + 718095^2 .

It is not a de Polignac number, because 3031012021221 - 2² = 3031012021217 is a prime.

It is a super-3 number, since 3×3031012021221³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3031012021194 and 3031012021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3031012021201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168389556726 + ... + 168389556743.

It is an arithmetic number, because the mean of its divisors is an integer number (729688079185).

Almost surely, 2^{3031012021221} is an apocalyptic number.

It is an amenable number.

3031012021221 is a deficient number, since it is larger than the sum of its proper divisors (1347116453889).

3031012021221 is a wasteful number, since it uses less digits than its factorization.

3031012021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336779113475 (or 336779113472 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 3031012021221 its reverse (1221202101303), we get a palindrome (4252214122524).

The spelling of 3031012021221 in words is "three trillion, thirty-one billion, twelve million, twenty-one thousand, two hundred twenty-one".