3001213122221 has 4 divisors (see below), whose sum is σ = 3001421020092. Its totient is φ = 3001005224352.

The previous prime is 3001213122217. The next prime is 3001213122223. The reversal of 3001213122221 is 1222213121003.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2241158702500 + 760054419721 = 1497050^2 + 871811^2 .

It is a cyclic number.

It is not a de Polignac number, because 3001213122221 - 2² = 3001213122217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3001213122193 and 3001213122202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3001213122223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103927280 + ... + 103956153.

It is an arithmetic number, because the mean of its divisors is an integer number (750355255023).

Almost surely, 2^{3001213122221} is an apocalyptic number.

It is an amenable number.

3001213122221 is a deficient number, since it is larger than the sum of its proper divisors (207897871).

3001213122221 is a wasteful number, since it uses less digits than its factorization.

3001213122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207897870.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 3001213122221 its reverse (1222213121003), we get a palindrome (4223426243224).

The spelling of 3001213122221 in words is "three trillion, one billion, two hundred thirteen million, one hundred twenty-two thousand, two hundred twenty-one".